SolidWorks Session 2Ferdowsi University of MashhadDr. Behnam Moetakef ImaniWinter 2011

What is Sketch?

• The sketch is the basis for a 3D model. You can create a sketch on any of the default planes (Front Plane, Top Plane, and Right Plane)

Sketch Snaps

Arc types Tool Arc properties

Centerpoint Arc Sketches arcs from a centerpoint, a start point, and an end point.

Tangent Arc Sketches arcs that are tangent to sketch entities.

3 Point Arc Sketches arcs by specifying three points (start, end, and midpoint)

Circle

Line & Point

Polygon

Sketch Tools : Fillets

Sketch Tools : Chamfer

Sketch Tools : Offset & Convert Entity

Sketch Tools : Trim Entities

Sketch Tools : Extend Entities

Sketch Tools : Split Entities

Sketch Tools : Mirror

Sketch Tools: Move or Copy

Sketch Tools: Rotate

Sketch Tools: Scale

Sketch Tools : Linear Pattern

Sketch Tools : Circular Pattern 1

Sketch Tools : Circular Pattern 2

The Status of a Sketch

• Under defined– Additional dimensions or relations

are required.– Under defined sketch entities are

blue (by default).

• Fully defined– No additional dimensions or relationships

are required.– Fully defined sketch entities are

black (by default).

• Over defined– Contains conflicting dimensions or

relations, or both.– Over defined sketch entities are

red (by default).

Dimension : Smart Dimension

Relations :

Relations

• Coincident– A point and a line, arc, or ellipse. 

– The point lies on the line, arc, or ellipse

• Merge Points– Two sketch points or endpoints.

– The two points are merged into a single point. 

Sketch the 2D profile

Extrude the sketch Resulting base feature

To Create an Extruded Base Feature:

1. Select a sketch plane.

2. Sketch a 2D profile.

3. Extrude the sketch perpendicular to sketch plane.

Select the sketch plane

To Create a Revolved Base Feature:

1. Select a sketch plane.

2. Sketch a 2D profile.

3. Sketch a centerline (optional).

4. Revolve the sketch arounda sketch line or centerline.

Centerline (optional)

To Create a Sweep Feature

1. Sketch a Profile

2. Sketch a Path

3. Sweep the profile along the path

To Create a Loft Feature

1. Sketch a Series of Profiles

2. To Create a Solid Model

Use the loft feature

Sketch Complexity

• Complex sketches rebuild faster. Sketch fillets can be recalculated much faster than fillet features, but complex sketches can be harder to create and edit.

• Simple sketches are more flexible and easier to manage. Individual

features can be reordered and suppressed, if necessary.

Design Intent

• Design Intent or can be said “design for change.”

• Design Intent means that when you put the parametric sketch relations together with the feature intelligence, you can build models that react to change in predictable ways.

• This gives you a great deal of control over changes.

• An example of Design Intent could be a written statement that describes general aspects that help define the design of a part, such as:– “This part is symmetrical, with holes that line up with Part A

– and thick enough to be flush with Part B.”

– From this description, and the surrounding parts, it is possible to re-create the part in such a way that if Part A or Part B changes, the part being described updates to match.

Editing or deleting

• When editing or repairing relations, it is considered best practice to edit rather than delete.

• Deleting often causes additional problems further down the tree.

• Many users find it tempting to delete anything that has an error on it.

Selecting Display/Delete Relations

تمرین •کلیه مهره های شطرنج و صفحه آنرا مدل نمایید.1.

End of Session Two