3D Objects | Profile-Based

Extrusions

Extrusions produce a 3D object from a 2D profile by ‘sweeping’ a profile to a height or depth.The profile to be extruded must be on the WorkplaneThe resulting shape of the extrusion can be set before using the Extrude options or the Properties page.The resulting shape of the extrusion can be modified after the extrusion using the Selection Info Palette.Some extrusion options are shown below.

Simple Extrude

Ribbon : Draw | Draw 3D | Simple Extrude

Default Menu : Draw | 3D Object | 3D Profile Based | Simple Extrude

Palette : 3D Model | 3D Object | Simple Extrude

This extrusion tool sweeps a 2D profile in a plane perpendicular to the Workplane to create a 3D object.

A bi-directional extrusion can be created which creates an above and below Workplane extrusion, shown below.

When an open profile is selected for extrusion, the resulting shape is a surface object.

2D profile on Workplane

Extrusion created perpendicular to Workplane

Bi-directional sweep creates an above and below Workplane extrusion

Two Sided Extrusion

Ribbon : Draw | Draw 3D | Simple Extrude

Default Menu : Draw | 3D Object | 3D Profile Based | Simple Extrude

Palette : 3D Model | 3D Object | Simple Extrude

(right click to display options or selection options from status bar at the base of the editor)

An above or below Workplane extrusion of a 2D profile can be produced.

The extrusion of the profile will be equal either side of the Workplane.

In the example, below, the profile from which the part is created is shown selected. The total height of the extrusion is 50, therefore a height of 25 is given.

Two-Sided Extrusion. Extrusion produced equidistantly about the profile.

Rail Sweep

Ribbon | Draw | Draw 3D | Rail Sweep

Default : Draw | 3D Object | 3D Profile Based | Rail Sweep

Palette : 3D Model | 3D Object | Rail Sweep

This tool sweeps an open or closed 2D profile along a predetermined path defined by another 2D profile.

The profile and path do not have to lie in the same plane.

Worked Example

In the illustration, below, the hexagonal profile lies in a perpendicular plane to the profile.

When using the Rail Sweep tool, the profile is moved to the path and the profile is forced along the path.

Profile and Path

Profile moved to Path

Result

Quick Pull

Ribbon | Modify | 3D Modifications | Quick Pull

Default : Modify | Modify 3D Objects | Quick Pull

Palette : 3D Model | 3D Object | Quick Pull

This tool allows for the planar extrusion of a face of a part, either as a quick modeling function, or by a specific extrusion height/depth.

In the example below, the front face is selected for extrusion. The keyboard pgup or pgdn keys are used to cycle between the available faces of the part.

Front face selected for extrusion

Worked Example

Draw a 3D box to measurements100 x 80 x 50, shown below.  The face shown shaded will be extruded to an additional outward distance  of 40.

From the Modify menu select the Quick Pull tool and select the indicated face, shown below.

Drag the cursor in an outward direction to establish the direction of the pull, then TAB to the data fields and input a value of 40 and press enter.

The result is shown below.

Take Note

The extrusion offset of the selected face can be done to either side of the face. In the example below, the offset is to the inside of the part. Select the face to manipulate, then drag the cursor in the offset direction. The exact distance can be input into the data field if preferred.

Revolve

Ribbon : Draw | Draw 3D | Revolve

Default Menu : Draw | 3D Object | 3D Profile Based | Revolve

Palette : 3D Model | Revolve

A 2D polyline can be used to create a suitable profile which can be revolved about an axis to produce a 3D object..If the start and end point of the polylines are collinear, then the resulting object will be a closed, filled area.After the revolve function has been completed, the profile can be modified using the Edit Tool.  A new shape will be produced after the profile has been modified.The resulting part is modified using the Selection Info palette.

Worked Example

A 2D polyline, shown in bold, in the illustration below was used as the profile. The revolution axis is shown by the construction line, indicated by the arrow. This is the line around which the profile will be revolved.

By selecting 2 snap points on the construction line, the profile is revolved around the axis to product the part shown below. In the example below, the profile is shown by the arrow.

Part created by revolving profile about an axis of revolution

Take Note

The smoothness of the part is controlled through approximation lines. In the example above, the number of approximation lines is increased to 56. This is done by selecting the part, right clicking and selecting the Properties menu from the context menu. The number of longitudinal and latitudinal segments is increased, shown below to adjust the degree of smoothness.

Adjusting the number of segment lines

In the example below, the part is selected and the Selection Info palette is used to update the degree of rotation of the part, shown below.

---

Revolve Spiral Pitch

The Spiral Pitch of the Revolve function can be adjusted to produce different results. In the illustration below, a single line and circle are drawn in the workspace in the same plane. The radius of the circle is 8.

Example

The Spiral options are modified by selecting the Revolve tool, then right clicking in the workspace and selecting the Properties Sheet. The Revolve Shape option is selected. In the example below, the Spiral Pitch is set to 30 and the number of coils is set to 5.

By selecting the circle as the entity to revolve and the line as the revolve path, the result shown below is produced.

Spiral Pitch and Coils

TurboCAD Deluxe 2D/3D Training Program – 2024 – All Rights Reserved