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