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Sketching in Solid Edge  part 2
1
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Learning Objectives:
✴
What are sketch constraints
✴
How to constrain a profile/sketch
✴
What are geometric relationships in Solid Edge
✴
How to view and delete geometric relationships
✴
How to add geometric relationships to sketches
✴
What methods for dimensioning are available in Solid Edge
✴
How to add dimensions
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How to modify dimensions
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A sketch is fully constrained when all sketch entities are
completely defined.
‣
Simply creating a sketched entity does not constrain it
•
Almost any sketched entity can be translated, rotated, or resized
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A completely constrained entity has a set of parameters that specify
its location, orientation, and size. For instance:
•
The parameters for a singe line are the planar coordinates of its endpoints or
the planar coordinates of one endpoint together with its length and an angle
from some reference datum
•
The parameters for a circle are the planar coordinates of its center and its
radius/diameter
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Once one entity is fully constrained, others may be constrained
relative to the first.
•
For instance, a second line may be partially constrained by defining it to be
parallel or perpendicular to the first.
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Constraints consist of:
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geometrical relationships (parallel, perpendicular, tangent, etc.); and
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dimensions (linear and angular).
2
Sketching in Solid Edge  part 2
❖
Completely constrained profiles/sketches are
important
✴
When entities are completely constrained, you have control over
the behavior of the sketch when modifications are made.
✴
If entities aren’t fully constrained, modifications to the sketch can
change the sketch in random ways that may destroy hours of
work.
✴
For a novice, constraining sketches can be very frustrating
because the constraints needed are not always obvious.
‣
Start small  fully constrain each entity as it is created.
‣
As you gain experience, you can add constraints as needed after the
basic sketch has been created.
3
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4
Relationships may be added
and/or displayed using the
various relationships
commands on the
Features
and Relationships
toolbar
Sketching in Solid Edge  part 2
5
Hole Circle
Axis of Revolution
Rectangular Pattern
Circular Pattern
Smart Boss Location
Virtual Component Structure Editor
Component Image
Construction Display
Activate part
Connect
Concentric
Horizontal/Vertical
Collinear
Parallel Relationship
Perpendicular
Lock
Rigid Set
Tangent
Equal
Symmetric Relationship
Symmetry Axis
Show/hide Relationships
Drawing
Acitivate/deactivate tools
Relationships
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Geometric relationships
✴
Geometric relationships are operations applied to sketched entities
that relate them to the other sketched entities using standard
geometrical concepts (e.g., collinear, parallel, perpendicular,
concentric, tangent, connected, etc.)
✴
They make it
much
easier to define a sketch  a few geometrical
relationships can replace dozens of dimensions.
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This note was uploaded on 07/20/2009 for the course AME 308 taught by Professor Shiflett during the Spring '07 term at USC.
 Spring '07
 Shiflett

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