extrude

[NX8-HELP] DESIGN FEATURE 1

Extrude drive24ward (meslab.org/mes)

Extrude Use the Extrude command to create a solid or sheet body by selecting a section of curves, edges, faces,

sketches, or curve features and extending them a linear distance.

The following example shows how Extrude can form a solid body from a section of curves.

You can:

Size an extrude feature by dragging distance handles or specifying distance values.

Unite, subtract or intersect an extrude feature with existing bodies.

Produce multiple sheet or solid bodies with a single extrude feature.

Trim an extrude feature using faces, datum planes or solid bodies.

Add drafts to an extrude feature.

Add offsets to an extrude feature, measured from its base section.

Where do I find it?

Application Modeling

Toolbar Feature→Extrude

Menu Insert→Design Feature→Extrude

Shortcut menu Right-click sketch→Extrude



Extrude a solid body

The following example shows you how to extrude a solid body.

1. On the Feature toolbar, click Extrude , or choose Insert→Design Feature→Extrude.

2. Select a closed string of curves or edges for the section.

A preview of the extrude feature based on the selected section and default parameters appears.

3. (Optional) Change the size of the extrude feature by dragging the Start handle.

4. Choose another command or click Apply to complete the extrude.



Create an extrude feature with an offset

This example shows how to extrude a solid body using an offset.


2. Select a closed string of curves for the section.

A preview of the extrude feature based on the selected section appears.

3. In the Extrude dialog box, in the Limits group, from the Start option list, select Until Extended .

4. In the graphics window, select a face on a solid body for the start of the extrude feature.

In the following figure, the selected face is highlighted in red.

The preview updates to the new start limit.

5. In the Limits group, from the End option list, select Until Extended.

6. In the graphics window, select a second face on the solid body for the end of the extrude feature.

The preview updates to the new end limit.



7. In the Offset group, from the Offset option list, select Two-Sided.

8. Type offset values in the Start and End boxes.

For this example, 0.0 for Start and –0.1 for End are entered.

9. In the Boolean group, from the list, select Unite, if it is not the inferred option.



Subtract an extrude feature

The following example shows how to subtract an extrude feature from a solid body.


The Extrude dialog box opens.

2. In the graphics window, select a closed string of curves or edges for the extrude section.

A preview of the extrude feature appears.

3. In the Extrude dialog box, in the Limits group, from the End option list, select Until Selected.

Select Object becomes active.

4. Select the face of another solid body.

The extrude preview updates so that it ends at the selected face.

5. In the Boolean group, from the list, select Subtract, if it is not the inferred option.



The extrude preview updates using the target body.

The Select Body option is available to select other bodies to include in the Boolean operation.

Note If there is only one solid body in the part, it is automatically selected as the target body.




Extrude between two bodies

The following example shows you how to create an extrude feature between two solid bodies.


2. Select a string of curves or edges for the section.

A preview of the extrude feature appears.

3. In the Limits group, from the End option list, select Until Selected.

Tip You can also right-click the End limit handle and choose Until Selected.

4. Select Object appears.

5. Select an object where you want to end the extrude feature.

For this example, the near face of a solid body is selected.

6. In the Limits group, from the Start option list, select Until Selected.

Select Object appears.

7. Select an object where you want the extrude feature to start.



For this example, the far face of another solid body is selected.




Extrude with an asymmetric angle

This example shows how to extrude a draft with an asymmetric angle.


2. Select a closed string of curves or edges for the section.

A preview of the extrude feature based on the selected section and default parameters appears, as

in the following example.

Note If the extrude preview is not already two-sided (that is, it appears on both sides of the

section), drag a limit handle to make it two-sided.

3. In the Draft group, from the Draft option list, select From Section-Asymmetric Angle.

Tip You can also right-click the extrude preview and choose Draft→Draft→From Section-

Asymmetric Angle.

4. Angle handles appear with default values.

5. 6. In the Draft group, from the Angle Option list, select Single.

7. Drag the Front Angle and Back Angle handles to get the angles and shape you want. You can

also type values in the Front Angle and Back Angle boxes.

For this example, 2 is entered for Front Angle and –13 is entered for Back Angle.



Extrude using a section with self-intersecting curves

This example shows how to extrude a section with self-intersecting curves as a single feature.

1. Make sure the Customer Default setting will allow self-intersecting sections.

Choose File→Utilities→Customer Defaults→Modeling→General.

On the Miscellaneous page, select the Allow Self-intersecting Section in Extrude Feature

check box.

2. On the Feature toolbar, click Extrude .

3. Select the section curves.

4. Set and select the desired parameters.

For this example:

o Offset = Symmetric

o Start/End = 2.0 and 2.0

o Limits (Start/End) = 0.0 to 5.0

o Inferred = Boolean (Unite)




Extrude dialog box Section

Select

Curve

Lets you specify one or more sections of curves or edges to extrude.

If you select multiple sections, you get multiple sheet bodies or solid bodies, but only one

extrude feature.

Sketch Section

Opens the Sketch task environment so you can create an internal sketch.

Curve

Lets you select curves, edges, a sketch, or a face for the section to extrude.

If you select a planar face when the Selection Intent rule is set to Infer Curves, the Sketch

task environment opens to let you sketch new curve sections on the face.

Note A section cannot include 3 or more curves whose end points coincide.

Direction

Specify

Vector

Lets you define the direction to extrude the section by selecting a vector method from the

Specify Vector option list or the Vector Constructor , and then selecting faces,

curves, or edges supported by that type.

The extrude feature and its direction are associative.

Reverse

Direction

Reverse Direction

Changes the direction of the extrude to the opposite side of the section.

You can also change the direction by right-clicking the direction vector arrowhead and

choosing Reverse Direction.

Limits

Start /

End

Lets you define the start and ends of the extrude feature, as measured from the section.

Value Specifies numeric values for the start or end of the extrude feature.

Values above the section are positive and those below are negative.

You can drag the limit handles on either side of the section or type

values directly in the Distance boxes or in the on-screen input boxes.

Snap to Object

Available on the shortcut menu when Start or End is set to Value.

Lets you define a Start or End distance value by selecting a point, a



planar face, or a datum plane. The software calculates the distance

along the extrude vector and sets the value. There is no associativity

to the point, face, or datum plane.

Note If you use a planar face or datum plane as the “Snap to” object,

Siemens PLM Software recommends that the face or datum be

normal to the extrude vector.

Until Next Extends the extrude feature to the next body along the direction path.

Until

Selected

Extends the extrude feature to a selected face, datum plane, or body.

If the extrude section extends past or does not completely intersect

the selected face, the software extrudes the section onto adjacent

faces of the selected face. If the selected face and its adjacent faces

still do not intersect the extrude section completely, the extrude will

fail, and you should try the Until Extended option.

Until

Extended

Trims the extrude feature (if it is a body) to a selected face when the

section extends beyond its edges.

If the extrude section extends past or does not completely intersect

the selected face, the software extends the selected face

mathematically when possible, and then applies trimming. A planar

selected face would be unlimitedly extended to make the trimming

successful, whereas a B-spline surface could not be extended.

Symmetric

Value

Converts the Start limit distance to the same value as the End limit.

Through

All

Extends the extrude feature completely through all selectable bodies

along the path of the specified direction.

Distance

Appears for both the Start and End options when either is set to Value or Symmetric

Value.

Sets the start and end limits for the extrude feature to the values you enter in the boxes.

Select

Object

Appears for both the Start and End options when either is set to Until Selected or Until

Extended.

Lets you select a face, sheet body, solid body, or datum plane to define the bounding start or

end limit of the extrude feature.

Boolean

Boolean

Lets you specify how the extrude feature interacts with bodies it comes in contact with.

None Creates an independent extrude solid body.

Unite Combines the extrude volume with a target body into a single body.

Subtract Removes the extrude volume from a target body.

Intersect Creates a body containing the volume shared by the extrude feature and



existing bodies it intersects.

Inferred Determines the most probable Boolean operation based on direction

vector of extrude and the position of the objects being extruded.

This is the default option but you can override this option.

Select

Body

Appears when the Boolean Option is set to Unite, Subtract, or Intersect.

Lets you select a target body.

Draft

Draft

Lets you add a slope (draft) to one or more sides of the extrude feature.

Note You can add a draft only to an extrude feature based on a planar section.

None Does not create a draft.

From Start

Limit

Creates a draft beginning from the extrude start limit.

From Section Creates a draft beginning from the extrude section.



From Section-

Asymmetric

Angle

Available when the extrude feature extends from both sides of the

section.

Creates a draft starting from the extrude section, sloping in

opposite directions both in front and back of the section.

You can separately control draft angles on each side of the section

using the Angle Option.

From Section-

Symmetric

Angle


section.

Creates a draft starting from the extrude section, sloping at the

same angle in opposite directions both in front and back of the

section.

From Section-

Matched Ends


section.

Creates a draft starting from the extrude section, sloping in

opposite directions both in the front and the back of the section.

The shape at the end limit is matched to that of the start limit, and

the draft angle for the end limit changes to maintain the matched

shape.



You can also select draft options by right-clicking the extrude preview.

Angle

Option

Lets you specify draft angles.

Single Adds a single draft angle for all faces of the extrude feature.

You can change the angle by typing a value in the Angle box, or by

dragging the angle handle or typing a value in the on-screen input box.

Multiple Adds unique draft angles to each tangent chain of faces of the extrude

feature.

You can edit the angles by selecting them from the dialog list box and

typing new values in the Angle box. You can also drag the angle handles

or type values in the on-screen input boxes.

This option is not available when the Draft option is From Start Limit.



Multiple angles on a From Section draft

Multiple angles on a From Section-Asymmetric Angle draft

Angle

Lets you specify a value for a draft angle.

If the Angle Option is set to Multiple, the value is applied to the selected angle in the list

box. Otherwise, the value applies to all angles in the draft.

A positive angle slopes the sides of the extrude feature inward toward the center of the

selected curves.

A negative angle slopes the sides of the extrude feature outward away from the center of the

selected curves.

Front

Angle

/

Back

Angle

Available when the Draft option is set to From Section — Asymmetric, with the Angle

Option set to Single.

Lets you assign separate angle values to the front and back sides of an asymmetric extrude

feature.

List

Appears when the Angle Option is set to Multiple, when you can assign separate draft

angles to each tangent chain of faces in the extrude feature.



Displays the name and value for each draft angle.

You can edit an angle by selecting it in the list box and typing a new value in the Angle box,

by typing a value in the on-screen input box, or by dragging its angle handle.

Offset

Offset

Lets you specify up to two offsets for the extrude feature, either by typing values relative to

the section or by dragging offset handles.

None Does not create and offset.

Single-

Sided

Adds a single end offset to the extrude feature. This kind of offset lets

you fill holes and create bosses, and simplifies part development.

Two-Sided Adds an offset to the extrude feature with start and end values.

Symmetric Adds an offset to the extrude feature with duplicate start and end

values, measured from opposite sides of the section.



The value for both start and end is determined by the last one you

specify.

Start Lets you specify a value for the start of the offset, relative to the section.

End Lets you specify a value for the end of the offset, relative to the section.

Settings

Body Type

Lets you specify either a sheet body or solid body for the extrude feature.

Solid

Sheet

To get a solid body, the section must be either a closed profile section or an open profile

section with an offset. If you use an offset, you will not be able to get a sheet body.

This option is available when you create or edit an extrude feature. In some cases you can

change some existing extruded sheet bodies to solid bodies, or vice versa.

Tolerance Lets you specify a distance tolerance different from the default.

Tip You can right-click the section and direction handles, and the preview to quickly access many extrude

options.

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