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S7-1V5 Fundamentals, Section 7, November 2002
SECTION 7
WIREFRAME AND SURFACE DESIGN
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WIREFRAME AND SURFACE DESIGN
Wireframe and surface design concept
Wireframe and surface design interface
Creating wireframe geometry
Creating basic surfaces
Surface-based solid features
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WIREFRAME AND SURFACE DESIGN
CONCEPT
CATIA V5 Wireframe and Surface Design is used to
create 3D points, lines, curves, planes and surfaces.
3D wireframe elements are often used as referenceelements in the creation of surfaces or solid features.
Wireframe and Surface Design main concepts:
3D wireframe creation - points, lines, curves and planes can be defined
directly in the 3D environment.
Surface design - a surface is used to define the topology of a part thatcan not be defined using solid features.
Surface-based solid features - surface geometry can be used to createsolid features.
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S7-5V5 Fundamentals, Section 7, November 2002
WIREFRAME AND SURFACE DESIGN
METHODOLOGY 3D wireframe creation
The relative position of components
is defined by assembly constraints.
If a component moves, constraints
can be updated to restore position.
Components positioned
with assembly constraints
Components prior
to positioning
Surface contact and axial
coincidences created
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S7-6V5 Fundamentals, Section 7, November 2002
WIREFRAME AND SURFACE DESIGN
METHODOLOGY Surface design
The relative position of components
is defined by assembly constraints.
If a component moves, constraints
can be updated to restore position.
Components positioned
with assembly constraints
Components prior
to positioning
Surface contact and axial
coincidences created
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WIREFRAME AND SURFACE DESIGN
METHODOLOGY Surface-based solid features
The relative position of components
is defined by assembly constraints.
If a component moves, constraints
can be updated to restore position.
Components positioned
with assembly constraints
Components prior
to positioning
Surface contact and axial
coincidences created
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The V5 Wireframe and Surface Design tool is used:
to create 3D points, lines, curves and planes used as construction
geometry when defining surfaces or solid features
to create wireframe geometry directly in 3D not limited to a 2D
sketch plane
to create surface geometry defining the part topology which is able
to be used in the creation of solid features
WIREFRAME AND SURFACE DESIGN
METHODOLOGY
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WIREFRAME AND SURFACE INTERFACE
Accessing the workbench
Settings and customizations
Workbench toolbars
Terms
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ACCESSING THE WORKBENCH
Access the Wireframe and Surface Design workbench
1. Select Wireframe
and Surface Design
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Activating the Wireframe and Surface workbench:
A new part document is created.
An Open Body is added in the tree as the In Work Object.
ACCESSING THE WORKBENCH
Wireframe and Surface
Design workbench
Open body is the
In Work object
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SETTINGS AND CUSTOMIZATIONS
Select the
Shape branch
Wireframe and Surface Design settings Settings that effect wireframe and surface creation are linked to the
settings for Part Design.
Settings are identical and can be changed in Shape or Part Design.
Settings are
linked
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Select:
Selection tools and Sketcher.
Wireframe and Surface Design toolbars
WORKBENCH TOOLBARS
Wireframe:
Create 3D wireframe
geometry.
Select
Sketcher
Point
Line
Plane
Projection - includes combine, reflect line
Intersection
Parallel curve
Circle - includes corner, connect curve, conic
Spline - includes helix, spiral, polyline
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Surfaces:
Create surface geometry.
Wireframe and Surface Design toolbars
WORKBENCH TOOLBARS
Operations:Modify, transform or
extract geometry from
existing elements.
Extrude
Revolve
Sphere
Offset
Sweep
Fill
Loft
Blend
Join - includes healing, untrim, disassemble
Split - includes trim
Boundary - includes extract
Translate - rotate, symmetry, scaling, affinity, axis to axis
Extrapolate
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Wireframe and Surface Design toolbars
WORKBENCH TOOLBARS
Replication:
Create several instances
of a wireframe or surface
object.
Constraint
Constraint Dialog Box
Object Repetition - includes points and planes repetition
Pattern - includes rectangular, circular
PowerCopy (advanced replication tool)
UserFeature (advanced replication tool)
Analysis:
Curve and surface
analysis tools.
Connect checker - analyze surface connections
Curve connect checker - analyze curve connections
Constraints:
Apply constraints.
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Additional user tools are available during wireframe
and surface creation.
User tools provide assistance in the geometry creation process.
A user tools icon will be highlighted when activated.
USER TOOLS
Update all
Axis system
Work on support
Snap to point
Select body
Icon activated
(highlighted)
Working supports activity
Create datum
Icon not
activated
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Wireframe and Surface user tools:
Update All
Update design to current specifications.
Axis System creation
Create a local coordinate axis system to work in.
Work On Support Create a surface or planar support element to work on.
Snap To Point
Snap to the nearest grid intersection point when working on a support.
Working Supports Activity Activate or deactivate the current working support.
Create Datum
Create an element without history when this icon is active.
USER TOOLS
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Wireframe and Surface user tools (continued):
Catalog Browser
Create instances from a catalog or from a document (advanced
replication tools).
Select Body Select a body from the pull-down list to make it the In Work body. This
is a convenient method for defining a body as the In Work object.
USER TOOLS
Select the body
Body is now theIn Work object
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In the V5 part structure: Open Body - an open body contains wireframe and surface
geometry created for use in the design of the part.
- accessing the Wireframe and Surface workbench will
create an open body in the specification tree.
Part Body - the part body contains solid geometry features createdusing the Part Design workbench.
WIREFRAME AND SURFACE TERMS
Open body
Part body
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CREATING WIREFRAME GEOMETRY
Points
Lines
Planes
Curves
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Methods for creating wireframe geometry:
Use the Sketcher icon to create geometry located on a 2D
sketch plane.
Use the Wireframe toolbar icons to create geometry that is defined
based on 3D coordinate system parameters or in relation to existing
3D geometry.
CREATING WIREFRAME GEOMETRY
Projection curve
Intersection curve
Parallel curve
Point on surface
Point on curve Point
tangent to curveLine tangent to curve
Line normal to surface
Offset PlanePlane normal to curve
Plane tangent to surface
Circle
Connect curve
Spline
HelixWireframe toolbar
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General process
CREATING WIREFRAME GEOMETRY
1. Select icon
from Wireframe
toolbar.
2. Select the
definition type
from choices inpull-down box.
3. Select other
geometry (if
necessary).
4. Specify the
parameters.
5. Click Apply
to preview, OK
to accept.
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4
2
5
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CREATE A POINT
Use the Point icon to create a point located in 3D.
Choose the type of point from the pull-down box.
Choose a new
reference point or
accept the defaultpoint as displayed
Choose the type
of point to define
Note: The reference point is the
origin from which parameter
values are measured.
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CREATE A POINT
Coordinates
Specify point coordinates (x,y,z) from the reference point.
Select an existing point as reference.
Coordinates
of new point
(0, -5, 6)
Reference point
(0, -5, 6)
Reference point
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CREATE A POINT
On curve
Specify location on a curve at a distance from the reference point.
Selected curve
Distance from
reference
Distance on curve
Ratio of curve length
Click for curvemid-point
Click for nearest
curve end-point
Distance as a ratio of curve
length (66% of total length)
New point
New point
Reference point
(green)
Reference
point
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CREATE A POINT
On curve
Additional options
Reverse the measure directionfrom the reference point
Distance along
the curve Distance from
point to point
Specify an existing
point as the reference
Repeat type
Parameters
Add additional points afterthe first point is created
First point
Repeated
points
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CREATE A POINT
On plane
Specify in-plane point coordinates (h,v) from the reference point.
Select an existing point as reference.
(2.5, 4)
Reference point
Reference point
Selected plane
Horizontal
and vertical
coordinates
of new point
Selected
plane
(2.5, 4)
A reference point is
projected onto the plane
if the selected point does
not lie on the plane.
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CREATE A POINT
On surface
Specify the direction and distance from the reference point. Direction can be specified by selecting a line, linear edge, plane or planar
surface. Selecting a plane or planar surface will specify a direction normal
to the plane.
Distance is measured along the surface contour.
Selected
direction (line)
Distance fromreference
New pointSelected surface
Reference point
(surface mid-point)
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CREATE A POINT
Additional options
Create a point between existing points
Create point(s) on a curve tangentto a specified direction line
Create a point at the centerof a circle or an arc
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MULTIPLE POINT CREATION
Use the Points Creation Repetition icon to createmultiple points spaced on a curve.
1. Select
a curve
2. Specify
instances
3. Activateoptions
End points included
in total instances
Points created in a
new Open body
Normal planescreated at point
instances
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S7-31V5 Fundamentals, Section 7, November 2002
CREATE A LINE
Use the Line icon to create a line located in 3D.
Choose the type of line from the pull-down box.
Choose the type
of line to define
Note: Start and End values
of zero (0in) will default to
the selected points.
Specify a start and end
point distance from the
initial points selected
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CREATE A LINE
Point - Point
Create a line between two selected points.
Specify the distance of start and end points from selected points.
Select a support
element for the
line (optional)
Selected points
Key in
distance(s)
New line
or Drag green
arrows at points
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CREATE A LINE
Point - Direction
Specify a start point and direction for the line.
Select a line to
specify direction
New line
Specify start
and end point
distance(s)
Start point
or Select a
plane to specify a
direction normal to
the plane
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CREATE A LINE
Angle / Normal to curve
Specify a start point on a curve and an angle for the line.
Select Normal to Curvefor an angle of 90 degrees
New line
Specify start and end
point distance(s)
Curve lies on theselected support
Start point
Selected
curve
Angle of line measured
from the curve tangent
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S7-35V5 Fundamentals, Section 7, November 2002
CREATE A LINE
Angle / Normal to curve
Special option: Specify an angled line on a supporting surface.
Activate Geometry on supportto create the angled line on the
support surface
Start point
Selected
curve
Selected
support surface
Not activated
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CREATE A LINE
Tangent to curve
Specify a line tangent to a curve starting at a selected point.
New line
Specify start and end
point distance(s)
Start point
Selected curve
Mono-Tangentmode
Line extent is
mirrored on both
sides of start point
Reverse the line
direction from
the start point
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CREATE A LINE
Tangent to curve
Specify a line tangent with two curves using bi-tangent mode.
Other solutions in
blue and numbers
in brackets (#)
Support
element
Current solutionis highlighted
Selectedcurves
Bi-Tangentmode
Multiple solutions
Click Next Solution tohighlight another solution
or Select on the screen
Click OK to
accept
highlighted
solution
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CREATE A LINE
Additional options
Create a line normal to a surface
Create a line bisecting the angle
between two selected lines
No support
elementLine created on
support surface
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Use the Plane icon to create a plane located in 3D.
Choose the type of plane from the pull-down box.
CREATE A PLANE
Specify the
parameters
Choose the typeof plane to define
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Offset from plane
Create a parallel plane offset by a distance from a reference.
Parallel through point Create a parallel plane through a selected point.
CREATE A PLANE
Offset
distance
Reference
plane
Reference
plane
Selected
point
3 in
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Angle / Normal to plane
Create a plane at an angle to a reference plane through an axis.
CREATE A PLANE
Specify angle
Rotation axis
New plane passes
through rotation axis New planeSelect Normal to Planefor an angle of 90 degrees
Drag the green Move symbolto reposition the new plane
Reference plane
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CREATE A PLANE
Through element options
Through two lines
Through a planar curve
Through pointand line
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Normal to curve
Create a plane normal to a curve at a given point.
Tangent to surface Create a plane tangent to a surface through a selected point.
CREATE A PLANE
Plane at
mid-point
(default)
Selected
curve
Selected
point
Selected
surface
Plane at
selected
point
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CREATE A PLANE
Additional options
Create a mean plane through points Create a plane by equation
Ax + By + Cz = D
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Curves generated from
existing geometry
Curves based on
parameters
CREATE A CURVE
Two general methods for creating curves located in 3D: Curves of a certain type based on parameters - examples include a
circle, spline, conic, helix, etc.
Curves generated from existing geometry - examples include curve
projections, intersections, parallel curves, etc.
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Part Arc
Whole Circle
Trimmed Circle
Complementary Circle
CREATE A CIRCLE
Use the Circle icon to create a circle or arc in 3D.
Select limitation
options
Choose the type
of circle to define
Specify start and end limit
angles for a partial arc
Specify
parameters
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CREATE A CIRCLE
Center and radius
Specify center point, support element and circle radius value.
Circlecenter point
Support element
(yz plane)
Key in radius value or drag green arrows
Specify angle limits for a partial curve.
Whole circle option
Part arc
option
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CREATE A CIRCLE
Center and point
Specify center point, support element and a point on the circle.
Circle
center point
Support element
(yz plane)
Part arc option
Point on circle
Angle limits are
measured from
point on circle
Whole circle option
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CREATE A CIRCLE
Two points and radius
Specify two points on the circle, support element and radius value.
Radius value
Trimmed
circle option
Select
2 points
Current solution
is highlighted
Multiple solutions
Click OK to accepthighlighted solution
Click Next Solutionbutton or select another
solution on the screen
Whole circle option
Complementary
circle option
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CREATE A CIRCLE
Bi-tangent and radius
Specify 2 tangent elements, support element and circle radius value.
2 elements(line and point)
Support element
(yz plane)
Circular arc created
(radius = 3.5 in)
Arc tangent to the
line (Element 1)
Arc tangent to the
point (Element 2)
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CREATE A CIRCLE
Bi-tangent and point
Specify a tangent element, tangent curve, point on the tangent curveand a support element.
Tangent element
(point, line, or curve)
Point of tangency
on selected curve
Tangent curve
(line or curve)
Support element
(yz plane)
Arc tangent to
the line (Curve 2)
at selected point
Arc tangent to the
point (Element 1)
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CREATE A CIRCLE
Additional options
Create a circle through 3 points
Create a tri-tangent circle(circle tangent to 3 elements)
C CO
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Use the Corner icon to create a rounded corner
between two elements in 3D.
CREATE A CORNER
Select elements
Specify corner
radius value
Multiplesolutions
Click OK to accepthighlighted solution
Click Next Solutionbutton or select another
solution on the screen
Corner created (no trim)
Elements
trimmed
Activate Trim Elementsoption to trim geometry at
the corner intersections
CREATE A CONNECT CURVE
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Use the Connect Curve icon to create a curve
connecting two existing curves at selected points.
Connect curve key points:
Elements that can be connected are either curves or lines.
Select points to define the connect curve endpoints.
Selected points must lie on the curves to be connected.
Point, tangency or curvature continuity can be imposed at the connect
curve endpoints. Modify continuity tension values to impact the connect curve shape.
Connected elements can be trimmed at the connect curve endpoints.
CREATE A CONNECT CURVE
CREATE A CONNECT CURVE
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General process
CREATE A CONNECT CURVE
1. Select theConnect
Curve icon.
2. Select the
points to be
used as curveendpoints.
3. Click button
to reverse the
continuity
direction.
4. Specify type
of continuity.
5. Choose trim
option Apply.
4
1
2 Selecting a pointautomatically
selects the curve
the point lies on
3
5
Connect
curve No elements
trimmed
CREATE A CONNECT CURVE
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CREATE A CONNECT CURVE
Additional options
Continuous curvature
at the Curve2 point
Tangency
direction
arrow (red)
Tangency
direction
reversed
Activate
Trim elements Elementstrimmed
Reverse Direction of continuity
Imposing Continuity at endpoints
CREATE A CONIC
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Use the Conic icon to create a conic type curve(parabola, hyperbola, or ellipse) in 3D.
The conic curve must lie on a planar support element.
A conic is defined using one of these object sets: Two points, start and end tangents, a parameter value
Two points, start and end tangents, a pass through point
Two points, a tangent intersection point, a parameter value
Two points, a tangent intersection point, a pass through point
Four points, a tangent
Five points
CREATE A CONIC
CREATE A CONIC
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General process
CREATE A CONIC
1. Select
Conic icon.
2. Select the
support plane.3. Select the
two endpoints.
4. Select the
elements used
to definetangency.
5. Specify the
parameter
value Apply.
4
1
2 3
Conic
Also, drag green
arrows to change
parameter value
3
5
CREATE A CONIC
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CREATE A CONIC
Two points, start and end tangents
2 lines selected as
start and end tangents
Support element
(yz plane)
2 points selected
Specify a Parameter value
Select a Pass through point
P = 0.5, parabolaP < 0.5, ellipse
P > 0.5, hyperbola
P = 0.7
CREATE A CONIC
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CREATE A CONIC
Two points, and a tangent intersection point
Point selected as
tangent intersectionfor both tangencies
2 points selected
Specify a Parameter value
Select a Pass through point
P = 0.3
Activate tangent
intersection
point option
CREATE A CONIC
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CREATE A CONIC
Four points, and a tangent
4 points selectedLine selected as
a start tangent
Five points
Select 2 endpoints then
select 3 additional points
Endpoints
Endpoints
CREATE A SPLINE
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Use the Spline icon to create a 3D curve passing
through selected points. Select points in the order that the spline should be constructed.
Points can be added before or after selected points.
Points can be replaced with a different point.
CREATE A SPLINE
Spline is created as
points are selected
Select 1st point
Select 2nd point
Pointoptions
Spline
created
CREATE A SPLINE
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Impose tangency or curvature conditions on the points
that define the spline. Click to highlight the point in the spline definition window.
Impose tangency or curvature on the highlighted point.
CREATE A SPLINE
Click Add Parametersbutton for tangency/
curvature options
Selected point
is highlighted
Tangency and
curvature options
Line selected to impose
tangency on Point.8
CREATE A PROJECTION
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Use the Projection icon to create elements by
projecting existing objects onto support geometry. Points and wireframe geometry can be projected on to a surface.
Points can also be projected onto wireframe geometry.
The projection can be normal to the support or a defined direction.
CREATE A PROJECTION
Support
surface
Curve to be
projected
Curve projected
onto surface
CREATE AN INTERSECTION
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Use the Corner icon to create a rounded corner
between two elements in 3D.
CREATE AN INTERSECTION
Select elements
Specify corner
radius value
Activate Trim Elementsoption to trim geometry at
the corner intersections
CREATE A PARALLEL CURVE
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Use the Corner icon to create a rounded corner
between two elements in 3D.
CREATE A PARALLEL CURVE
Select elements
Specify corner
radius value
Activate Trim Elementsoption to trim geometry at
the corner intersections
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CREATING BASIC SURFACES
From a profile
Sphere
From boundaries
From another surface - offset
Lofted surface
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SURFACE-BASED SOLID FEATURES
From a profile
Sphere
From boundaries
From another surface - offset
Lofted surface
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