3D Modeling Engineering II
Extruding a Profile • Select a construction plane (a default plane, a surface on the object, or create a new construction plane). • Create a 2D profile on the selected construction plane. • Specify the direction of the extrude. • Specify the distance of the extrude. • Specify the taper angle (if appropriate).
Extruding a Profile • Select a construction plane. • In this case the default Frontal Plane was selected.
Extruding a Profile • Create a 2D profile on the selected construction plane. • Create the geometry. • Add dimensions.
Extruding a Profile • Specify the direction of the extrude. • Specify the distance of the extrude. • Specify a taper angle if it is appropriate.
Extruding a Profile • Select a construction plane. • In this case the top surface of the existing model was selected.
Extruding a Profile • Create a 2D profile on the selected construction plane. • Create the geometry. • Add dimensions.
Extruding a Profile • Specify the direction of the extrude. • Specify the distance of the extrude. • Specify a taper angle if it is appropriate.
Revolving a Profile • Select a construction plane. • In this case the default Frontal Plane was selected.
Revolving a Profile • Create a 2D profile on the selected construction plane. • Create the geometry. • Add dimensions.
Revolving a Profile • Specify the axis of the revolution. • Specify the direction of the revolve. • Specify the angle of revolution.
Making a Cut • Select a construction plane. • In this case the top surface of the existing model was selected.
Making a Cut • Create a 2D profile on the selected construction plane. • Create the geometry. • Add dimensions.
Making a Cut • Specify the direction of the cut. • Specify the distance of the cut. • In this case the cut is defined Through-All.
Making a Revolve-Cut • Select a construction plane. • Create a 2D profile with a centerline on the selected construction plane. • Create the geometry. • Add dimensions.
Making a Revolve-Cut • Specify the direction of the cut. • Specify the angle of revolution.
Fillets • Most CAD programs do not distinguish between fillets and rounds. • Select the edges to be filleted. • Specify a fillet radius.
Chamfers • Select the edges to be chamfered. • Specify the chamfer. • An angle and a distance. • Two distances.
Linear Patterns or Arrays • Select the 2D or 3D feature(s). • Specify a direction for copying the objects in one direction. • Specify the distance between features as well as the number of features to duplicate in that direction. • Specify a direction for copying the objects in another direction. • Specify the distance between features as well as the number of features to duplicate in the second direction.
Circular Patterns or Arrays • Select the 2D or 3D feature(s). • Specify an axis of rotation for the feature(s). • Specify a direction for copying the objects in one direction. • Specify the distance between features as well as the number of features to duplicate in that direction. • Specify a direction for copying the objects in another direction. • Specify the distance between features as well as the number of features to duplicate in the second direction.
Mirroring Features • Select the 3D feature(s). • Specify a 2D plane to mirror the features about.
Creating a Loft • Create construction planes for each 2D profile. • Construct the 2D geometry on each profile. • Activate the loft command and select each profile.
Creating a Loft • Sometimes it is necessary to identify guide curves or rails. • Guide curves and rails help the computer with the interpolation between the profiles.
Creating a Loft • Most programs will allow the user to select different points on profiles. • With this option objects can be created that twist.
Creating a Sweep • Create a sketch to define the path of the sweep. • Create a sketch to define the profile of the sweep. Make sure the profile and the path intersect. • Activate the sweep command and select the profile and the path.
Shell • Select the faces of the solid that will be eliminated. • Determine a wall thickness for the shell.
Helix or Coil • A helix or coil can be used to create several types of parts. • When combined with a sweep, it is especially good for creating springs and for cutting threads. • Most software will allow a helix or coil to be defined by the following parameters: • Pitch and revolution. • Height and revolution. • Height and pitch.
