surface print

7/28/2019 Surface Print

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2/16Pro-Engineer SURFACES 2/ 16

Helical SweepCreates a quilt using helical sweep geometry.

AdvancedOpens the Advanced menu, allowing you to create surfaces using complex featuredefinitions.

You can also create surface feature by using any of the following options on the Edit menu:

CopyCreates a quilt by copying existing quilts or surfaces. Specify a selection method, and selectthe surfaces to copy. Pro/ENGINEER creates the surface feature directly on top of the selected surfaces.

FillCreates a planar quilt by sketching its boundaries.

MirrorCreates a mirrored copy of existing quilts or surfaces about the specified plane.

ExtendCreates a quilt or surface by extending the existing quilts or surfaces. Specify a chain ofboundary edges of the existing surface to extend. You can also specify the extend type, length, anddirection of the extended surface or quilt.

OffsetCreates a quilt offset from a quilt or surface.

Note: For more information about the creation of surfaces, refer to the Part Modeling module ofPro/ENGINEER Help.

Creating a Feature with an Open or Closed Volume

When creating a surface feature with Extrude, Revolve, Sweep,or Blend, you can create a quilt thatencloses a closed volume by capping the ends of the feature, or you can leave the ends open.

To create a surface feature without closing the ends, click Options from the dashboard and clear thCapped Ends check box. Else, click Capped Ends from the ATTRIBUTES menu. For example, anextruded circular section creates an open-ended tube with the open ends displayed with yellow edges.

To create a surface feature with a closed volume, click Options from the dashboard and click theCapped Ends check box. Else, click Capped Ends from the ATTRIBUTES menu. For example, anextruded circular section would result in a closed cylinder so all edges of the quilt are two-sided, shown imagenta. Note that the section must be closed for this option.

To Create a Joined or Unattached Quilt

A simple sweep created along the outer edges of another quilt or along datum curves created on these edgecan be joined with the reference quilt. A swept blend can be joined along the origin trajectory.

Once you have selected a valid reference edge or a datum curve, the SRFS JOIN menu appears with thefollowing options:

JoinJoins the surface feature with the existing quilt.

No JoinCreates a surface feature that is not attached to the existing quilt.

You can redefine the Join/No Join attribute when you redefine the features trajectory using Modify.

About Advanced Surface Features

Use Insert > Advanced to create the following advanced surface features:

Conic Surface and N-sided PatchCreates a conic quilt and creates a quilt from more than fourboundaries.

Blend Section To SurfacesCreates a quilt as a blend from a section to tangent surfaces.

Blend Between SurfacesCreates a quilt as a blend from a surface to tangent surfaces.

Blend From FileCreates a blended surface from a file.

Blend Tangent to SurfacesCreates a surface as a blend from an edge or a curve to tangentsurfaces.

Surface Free FormCreates a surface by dynamic manipulation.

Vertex RoundTrims a surface by filleting a flat surface.

Flatten QuiltCreates a flattened quilt.

About Creating a Blended Surface from a FileYou can create a blended surface by importing curves from a file in the IBL (.ibl) format.

You can also redefine the surface by redefining the curve definitions in the .ibl file. Using AssociativeTopology Bus (ATB), you can relink the changed .ibl file to the surface feature created. This allows ease ofdesign modification without having to create another surface and re-route the old surface references to thenew surface. The dependent geometry can easily refer to the changed surface.

As the data for the surface feature is stored in the part as well as in the file, even if the file is deleted fromthe disk, you can still modify the feature.

ATB does not support blending a surface from a file for features created prior to the J-03 release ofPro/ENGINEER.

You can:

Unlink the feature from the .ibl file to remove the associativity between the feature and the data file

Link another file to the feature.



Note: To be able to update the surface when the .ibl file changes, you must set the environmental variabletopobus_enable to "yes" in your config.pro file before you start the Pro/ENGINEER session. If theenvironment variable is set during the Pro/ENGINEER session, it does not work.

To Create a Blended Surface from a File

1. Click Insert > Advanced > Blend From File > Surface. The SURFACE: Blend from File dialogbox opens, listing the following elements from the surface feature:

o Coord SystemDefines the coordinate system for the surface feature to be created.

o File NameSpecifies the file name from which to create the surface. By default, Pro/ENGINEER

searches for this file in the current working directory. When using Pro/INTRALINK, link the .ibl file wirespect to the parent part and then export the file from the workspace to the Pro/INTRALINK startupdirectory. You cannot read the .ibl file from the workspace.

o MaterialSideSpecifies the side for adding the material. To change the direction, click Flip and thclick OK.

2. Click OK to create the defined surface.

To Update a Blended Surface from a File

1. To redefine and update a blended surface from a file, open the .ibl file and edit it.

2. To update the feature geometry with the changed data file, click File > Associative Topology BusThe following options are available :

o Check StatusChecks the selected feature for outdated imported geometry.

o UpdateUpdates outdated geometry for the selected feature.

o Change LinkChanges the file associated to the selected feature.

o Make IndependentRemoves the associativity between the .ibl file and the selected featurecreated from file.

o Auto Check Status on ActivateAutomatically verifies outdated features while activating a part.

o Auto Check Status on RetrieveAutomatically verifies outdated features while retrieving a part.This option is selected by default.

o Auto Check Status on UpdateAutomatically verifies outdated features while updating a part.

o Show LogShows a log of updates to geometry.

To Create a Conic Surface

1. Click Insert > Advanced > Conic Surface and N-sided Patch.

2. Click Conic Surf, Shouldr Crv or Tangent Crv,and Done from the BNDRS OPTS menu. A dialogbox opens and lists the following elements of the surface feature:

o CurvesSpecifies geometrical references for this feature.

o Conic ParamSpecifies the conic parameter.3. The Boundaries option in the CRV_OPTS menu is active. Define opposite boundaries of the conic

surface by selecting two curves or edges.

4. After bounding curves are defined, click Shoulder Crv or Tangent Crv from the OPTIONS menu andselect the conic curve in the same way as you selected bounding curves.

5. Click Done on the OPTIONS menu.

6. Enter the conic parameter value; it must be from 0.05 to 0.95. Sections of the surface are one of thefollowing types, according to their conic parameter value:

0.05 < parameter < 0.5 - ellipse

parameter = 0.5 - parabola

0.5 < parameter < 0.95 - hyperbola

7. Conclude feature creation by clicking OK in the dialog box.

Defining a Conic SurfaceThere are two types of conic surfaces listed in the OPTIONS menu:

Shouldr CrvThe surface passes through the control curve. The control curve defines the location conic shoulders for each cross section of the surface.

Tangent CrvThe surface does not pass through the control curve. The control curve defines theline that passes through the intersections of the conic sections asymptotes.

Rules for selecting curves or edges:

Only single-segment composite curves can be selected as boundary or control curves.

When selecting curves or edges with the Chain option, the chain cannot have more than oneedge/curve component.

Example: Conic Surface

This figure shows a conic surface created ShouldrCrv.



1 Boundaries

2 Control curve

The next figure shows a conic surface created with the Tangent Crv option.

1 Boundaries

2 Intersection of asymptotes

3 Control curve

To Create a Surface from More Than Four Boundaries

1. Click Insert > Advanced > Conic Surface and N-sided Patch. The BNDRS OPTS menu appears

2. Click ADV FEAT OPT > Boundaries > Done > N-Sided Surf> Done. The system opens a dialogbox and lists elements of the surface feature. They are:

o CurvesSpecifies geometrical references for this feature.

o Bndry Conds(Optional) Defines Boundary Conditions.

3. Select at least five boundaries in the consecutive order for the N-sided surface. Using the One ByOne option in the CHAIN menu, select at least five curves or edges forming a loop. When finished, clic

Done from the CHAIN menu.Note: The boundaries of the N-sided surface cannot include tangent edges/curves.

4. To define Boundary Conditions, click Bndry Cond and Define in the dialog box. The BOUNDARY menulists all surface boundaries. As you move the cursor over the boundary name, the correspondingboundary highlights in cyan.

5. Click the boundary for which you want to define Boundary Conditions. For the selected boundary, thesystem opens a dialog box with the BndryCond element selected for definition.

6. Specify the boundary condition by choosing one of the following options in the BNDRY COND menu,followed by Done:

o FreeNo tangency conditions are set along the boundary.

o TangentThe blended surface is tangent to the reference surface along the boundary.

o NormalThe blended surface is normal to the reference surface or datum plane.

7. For conditions other than Free, accept the defaults or select reference surfaces.8. To complete the feature creation, click OK in the dialog box.

Tip: Creating an N-Sided Surface

The shape of the N-sided patch depends on the geometry of the boundaries to be patched together. Forsome boundaries, the N-sided patch may produce geometry with undesirable shape and characteristics. Forexample, bad geometry may occur if

The boundaries have inflections

The angles between the boundary segments are very large (more than 160 degrees) or very small(less than 20 degrees)

The boundaries consist of very long and very short segments

If the N-sided patch does not create a satisfactory geometry, you can either create a series of N-sidedpatches on a smaller number of boundaries, or use the Blended Surffunctionality.



About Blend Tangent to Surfaces

The Blend Tangent to Surfaces functionality allows you to create a draft surface (blended surface) tangento surfaces from an edge or a curve. You may need to create a parting surface and a reference curve such aa draft line, before using the Blend Tangent to Surfaces functionality.

The types of tangent draft surfaces are:

Curve-driven tangent draft surfaceCreates a surface on one or both sides of a parting surface betweea reference curve (such as a parting curve or a sketched curve) and selected surfaces of the reference parttangent to these surfaces. The reference curve must lie outside the reference part.

Constant-angle tangent draft outside a draft surfaceCreates a surface by following the trajectory ofthe reference curve and creating surfaces at a specified constant angle to the pull direction. Use this featureto add tangent draft to surfaces that cannot be drafted with the regular Draft feature. You can also use thisfeature to add tangent drafts to a rib with rounded edges and preserve tangency to the reference part.

Constant-angle tangent draft inside a draft surfaceCreates a surface with a constant draft angleinside the draft surface. This surface is created on one or both sides of a reference curve (such as a draftcurve or a silhouette curve) at a specified angle to the reference part surfaces and provides a roundedtransition between the draft surfaces and the adjacent surfaces of the reference part.

When creating a tangent draft, you must select the draft type, the draft direction, and specify the pulldirection or accept the default draft direction. Next, select a reference curve and define other draft referencsuch as tangent surfaces or draft angle and radius, depending on the tangent draft type.

The optional elements of a tangent draft are:

Closing SurfacesLets you trim or, in some cases, extend the tangent draft up to selectedsurfaces. Use this element when adjacent surfaces are located at an angle to the surface beingdrafted.

Note: A closing surface must always be a solid surface. A datum plane or a surface geometry cannot beclosing surface.

Spine CurvesLets you specify an additional curve that controls the orientation of normals to thesectioning plane. Use this element if using the reference curve alone results in the geometryintersecting itself.

Cap AngleFor one-sided curve-driven tangent drafts. Controls the draft angle for additional planethat are automatically created when a draft line does not extend to the surface borders and you havnot specified the closing surfaces. If you do not specify a value, Pro/ENGINEER uses a zero angle.

Finally, you can edit the reference curve by using the Curves tabbed page in the Tangent Surface dialogbox. Select the reference curve segments to include in the draft line or exclude from the draft line. Use thisfunctionality when Pro/ENGINEER has trouble creating the tangent draft, for example, when the referencecurve intersects itself.

To Create a Quilt Tangent to a Surface

1. Create a reference curve.

2. Click Insert > Advanced > Blend Tangent to Surfaces. The Tangent Surface dialog box opens

with selected by default.

3. Specify the draft directionby selecting one of the following:

o One SidedThe draft is created only on one side of the reference curve.

o Two SidedThe draft is created on both sides of the reference curve.

4. Specify the pulldirection.

5. Click the References tab, click under Draft Line Selection, and select the reference curve. The

reference curve must lie outside the reference part geometry.

Note: If you have selected One Sided as the draft direction earlier, then you can click underParting Surface and select the parting surface.

6. Pro/ENGINEER automatically determines the surfaces that the draft is tangent to. However, if you are n

satisfied with the automatic selection, click under Tangent To and select the appropriate surfaceson the reference part.

7. Click to preview the tangent draft geometry. If required, you can change the draft geometryby specifying the Closing Surfaces, Spine Curves,or Cap Angle, located on the Options tabbedpage. You can also edit the reference curve by using the Curves tabbed page.

8. When satisfied with the feature geometry, click to close the dialog box and create the feature



Reference Curve Requirements for Curve-Driven Tangent Drafts

To create a curve-driven tangent draft, you must first create a reference curve. You can create a referencecurve as a sketched curve, a parting curve, or a silhouette curve with an offset. The reference curve must,

Be continuous, tangent, and nonintersecting.

Lie outside the reference part and be visible along the pull direction from both sides of the part.

Lie on the parting surface when creating a solid one-sided draft.

The following example shows the correct placement of the reference curve.

1. Reference part (side view)

2. Reference curve (viewed on end)

3. Pull Direction

The next example shows an incorrect placement of the reference curve, because if you look from the bottomof the part along the pull direction, the reference curve is obscured by the part geometry.

1. Reference part (side view)

2. Reference curve (viewed on end)

3. Pull Direction

Example: Creating a Curve-Driven Tangent Draft

This example shows how to create a tangent draft on both sides of the reference curve plane. You can use

any type of curve to create a curve-driven tangent draft, but to control the draft angle, create the curve as parting line with the appropriate angle, as shown in this example.


with selected by default.

2. Click the References tab. The Menu Manager and the CHAIN menu appear.3. Select a curve or an edge and click Done.

4. Click under Tangent To and select the appropriate reference surface.

5. Click . The following illustration shows a tangent draft on both sides of the reference curvplane.



Example: Specifying Cap Angle and Closing Surfaces

This example shows how to create a curve-driven solid tangent draft on one side of the sketched referencecurve (1). In this example, the feature is added in Part mode.

1. Create a flat surface that passes through the part, as shown in the following illustration.

2. Click Insert > Advanced > Blend Tangent to Surfaces. The Tangent Surface dialog box opens.

3. Select One Sided under Direction.

4. To specify the pull direction, select the surface created in Step 1 and click Okay.

5. Click the References tab, click under Draft Line Selection, and select the reference curve.6. Select the Tangent To reference curve (the default is automatic) and click Done.

7. Click under Parting Surface and select the surface created in Step 1.

8. Click . The tangent draft is created on one side of the reference curve, according to the pulldirection, as shown in the following illustration.

9. Click the Options tab, type 30 in the Cap Angle Value box, and press ENTER.

10. Click . The angle of the planar surfaces (1) changes on both sides of the tangent draftfeature, as shown in the next illustration.

11. Depending on your design intention, you may want the tangent draft to extend the complete length of

the part. Therefore, instead of specifying the Cap Angle, click under Select Surfaces on theOptions tabbed page and select the two closing surfaces of the part (1 and 2).

The resulting tangent draft geometry is shown in the following illustration.



Note: Depending on the draft line geometry, Pro/ENGINEER may or may not be able to extend the draftsurface up to the closing surfaces. It is recommended that you use appropriate tools to create and modifycurves to ensure that the draft line extends up to or past the intended closing surfaces, and then create atangent draft.

To Create a Constant-Angle Tangent Draft Outside a Draft Surface


2. Click3. Specify the draft directionby selecting one of the following:




Note: If you are creating a one-sided draft, the pull direction must point from the reference curve in thsame direction that the draft is being created.

5. Click the References tab, click under Draft Line Selection, and select the reference curve. Thereference curve can be any chain of edges or curves (such as a draft curve). The reference curve must on a surface of the reference part.

Note:You cannot select an assembly level silhouette curve as a reference curve for a tangent draft. Tocreate a tangent draft in the reference model, you must create a silhouette curve in the reference mode

itself.6. In the Angle box, type the value for the draft angle.

7. In the Radius box, type the value for the radius of the fillet that connects the draft surfaces with theadjacent surfaces of the reference part.

8. Click to preview the tangent draft geometry. If required, you can change the draft geometryby specifying the Spine Curves or Closing Surfaces on the Options tabbed page. You can also edit treference curve by using the Curves tabbed page.


Example: Creating a Constant-Angle Tangent Draft Outside a Draft Surface

In this example, a 5-degree draft is added to a rib, that has a 0.4" fillet at the bottom, as shown in thefollowing illustration. To preserve the fillet at the bottom, you must add a constant-angle tangent draft (in

this example, the feature is added in Part mode).


2. Click . The draft direction changes to One Sided.

3. Specify the pulldirectionby selecting the top surface of the housing. A red arrow pointing in theupward direction appears.

4. Click Flip so that the red arrow points down, because the pull direction must point from the referencurve in the direction of the tangent draft creation. Click Okay.

5. Click the References tab and select the top edge of the rib (1), as shown in the next illustration.Click Done.

6. In the Angle box, type 5 and press ENTER.



7. In the Radius box, type .4 and press ENTER (the radius is the same as the radius at the bottom of therib).

8. Click . The feature geometry is as shown in the following illustration.

9. To make the tangent draft extend all the way to the side of the rib, click the Options tab, clickunder Select Surfaces, and select the side of the rib (1), as shown in the previous illustration. Note tha gap exists between the tangent draft geometry and the central cylinder of the housing. To avoid thisgap, hold down the CTRL key and select the side surface of the central cylinder (2) as the second closinsurface. Click OK in the SELECT dialog box.

10. Click . The new feature geometry is as shown in the next illustration.

11. Click . The constant-angle tangent draft is created.

12. Repeat the procedure to create a constant-angle tangent draft on the other side of the rib.

To Create a Constant-Angle Tangent Draft Inside a Draft Surface


2. Click .

3. Specify the draft directionby selecting one of the following:




5. Click the References tab, click under Draft Line Selection, and select the reference curve. Thereference curve can be any chain of edges or curves (such as a draft line). The reference curve must lieon a surface of the reference part.

6. In the Angle box, type the value for the draft angle.

7. In the Radius box, type the value for the radius of the fillet that connects the draft surfaces with theadjacent surfaces of the reference part.

8. Click to preview the tangent draft geometry. If required, you can change the draft geometryby specifying the Spine Curves or Closing Surfaces on the Options tabbed page. You can also edit treference curve by using the Curves tabbed page.


Example: Creating a Constant-Angle Tangent Draft Inside a Draft Surface

This example shows how to draft the walls of the reference part by 5 degrees, while maintaining thedimensions at the bottom of the part and preserving the 0.4" fillet at the top.




2. Click . The draft direction changes to One Sided.

3. Accept the default pulldirection.

4. Click the References tab, click under Draft Line Selection, and select the reference curve.

5. On the CHAIN menu, click Tangnt Chain, select a bottom edge of the reference part as shown in thefollowing illustration, and click Done.

6. In the Angle box, type 5 and press ENTER.

7. In the Radius box, type .4 and press ENTER (the radius value is the same as the radius of the top fillet

8. Click . The tangent draft cut is created as shown in the next illustration.

Tip: Creating a Solid Draft from a Non-Solid Draft

To create a solid draft from a nonsolid draft, you must create a quilt tangent at both sides, cap the ends, anmerge the quilted surfaces, then create the solid protrusion with either the Use Quilt or Patch command.

Note: The system cannot generate drafts (solid or nonsolid) if any portion of the draft line is parallel to thepull direction.

To Create a Surface-to-Surface Blend

Use the Blend Between Surfaces command to create a smooth surface or solid transition between twosurfaces.

The surfaces used for this feature must have matching tangency points for each point on their surfaces, sucas with two spheres. The surfaces must be inclined toward each other by at least a 30 angle.

1. Click Insert > Advanced > Blend Between Surfaces > Surface. The SURFACE: Surface toSurface Blend dialog box opens.

2. Select the first surface to form the tangent surface boundary.

3. Select the second surface and middle-click. The blend is created.

To Create a Section-to-Surface Blend

Use Blend Section To Surfaces to create a transitional surface or solid between a set of tangent surfacesand a sketched contour. The set of surfaces selected for the tangent boundary must be closed.

1. Click Insert > Advanced > Blend Section To Surfaces > Surface. The SURFACE: Section toSurface Blend dialog box opens.

2. Select surfaces to form the tangent boundary. The surfaces must be tangent to each other. Pick allthe surfaces, then middle-click.

3. Select or create the sketching plane for the section boundary.

4. Specify the direction of feature creation and enter Sketcher mode.



5. Sketch the section boundary. The section must be closed.

6. Click .

About a Ribbon Surface

A Ribbon surface is a datum that represents a tangent field created along a base curve. The Ribbon surface tangent to reference curves that intersect the base curve.

You can use a Ribbon surface to impose tangency conditions between two surface features. With the Ribbonsurface you can define the patch structure so that adjacent surfaces can be made tangent to each otherwithout using one of them as a tangent reference. In this way, the Ribbon surface acts a tangent referenceUsing this method, you first create the Ribbon surface. They you can create each surface and make ittangent to the Ribbon surface. After you have created tangency between two adjacent surfaces, you can puthe Ribbon surface on a layer and blank it.

You can predefine a layer for ribbon surfaces. To do this, specify the name for the layer using the def_layer(LAYER_RIBBON_FEAT) configuration option. Each time you create a ribbon surface, the systemautomatically adds it to this layer.

To Create a Ribbon Surface

1. Click Insert > Model Datum > Ribbon. The DATUM: Ribbon dialog box opens.

2. On the Menu Manager, Add Curve in the RIBBON ITEM menu is active. Select the base curve. Youcan select a single curve or a chain of curves. The system uses the base curve as a trajectory for thribbon surface.

You can remove the curve with the Remove Curve command and show selected curves with the ShowAll Curves command. When finished selecting the base curve, click Done Curves.

3. Select the first reference curve. You can continue selecting additional reference curves. When you arefinished, click Done Curves.

The system creates the Ribbon surface with the default width.

4. Optionally, you can define the width of the ribbon surface. Select the Width element in the dialog boxand click Define. Enter the width of the surface.

5. Click OK to finish.

Example: Using a Ribbon Surface

This example shows how to create two boundary blends on both sides of the middle curve that are tangent each other. To impose tangency between two boundary blends, create a Ribbon surface along the middlecurve. When defining reference curves for the Ribbon surface, select the three inner curves on both sides ofthe middle curve.

The Ribbon surface (shown with red boundaries) is now tangent to all the reference curves.

Create the boundary blend on the left side of the middle curve. When defining boundary conditions, specifytangency condition on the middle curve by referencing the Ribbon surface. Because the Ribbon is tangent to

the inner side curves on the right, the boundary blend on the left is now tangent to the curve on the right.

Create the boundary blend on the right and make it tangent to the Ribbon surface.

About Trimming Quilts

You can trim quilts in several ways:



By adding a cut or slot as you do to remove material from solid features

By trimming the quilt at its intersection with another quilt or to its own silhouette edge as it appearin a certain view

By filleting corners of the quilt

By trimming along a datum curve lying on the quilt

For more information refer to the topic About the Trim Feature of the Part Modeling module of Pro/ENGINEEHelp.

To Trim a Quilt Using a Basic Form

1. Click Insert > Sweep, Blend, Helical Sweep or Swept Blend > Surface Trim. The SURFACETRIM dialog box opens.

2. Select the quilt to trim.

3. Start creating the cut geometry, as you do for solid protrusions. The surface definition that youcreate is used only for trimming and will not appear in the model.

4. If you create geometry using the Solid option, specify the side of the quilt to keep by choosing Sid1, Side 2, or Both Sides from the DIRECTION menu. Click Done. Selecting either side of the quilt tokeep preserves references of the original quilt.

5. If you chose Both Sides, an additional element Primary Quilt is added to the dialog box so that ycan specify which of the two new quilts will inherit the children of the original quilt. To do this, clickPrimary Quilt and Define in the dialog box. Click Side 1 or Side 2 and Done from the DIRECTIONmenu.

6. Click OK.

Trimming a Quilt Using Curves

You can trim a quilt along a chain of datum curves or edges.

The rules for defining a surface trim using a datum curve are as follows:

You can use a continuous chain of datum curves, inner surface edges, or solid model edges to trim quilt.

Datum curves used for trimming must lie on the quilt to be trimmed and should not extend beyondthe boundaries of this quilt.

If the curve does not extend to the boundaries of the quilt, the system calculates the shortestdistance to the quilt boundary and continues the trim in this direction.

Example: Trimming a Quilt Using Curves

1 Select these datum curves.

2 This arrow indicates the portion to keep.

To Trim a Quilt Using Vertex Round

Use Vertex Round to create fillets on outer quilt edges.

1. Click Insert > Advanced > Vertex Round. The SURFACE TRIM: Vertex Round dialog box open

2. Select vertices at the corners of the quilt to be rounded and click OK. All selected vertices must

belong to the same quilt.3. Enter the fillet radius. This radius will be applied to all selected vertices.

4. Click OK in the dialog box.

Example: Trimming with Vertex Round

This figure shows the corners to be rounded with the Vertex Round command.

1 Select these vertices to be rounded.

The next figure shows the resulting quilt.



To Create a Flattened Quilt

1. Click Insert > Advanced > Flatten Quilt. The FLATTEN QUILT dialog box opens.

2. Select a source quilt to flatten.

3. Select a datum point on the quilt to be the origin point. Two red arrows indicate the u-v directions o

the quilt.4. Specify one of the following methods for determining the parameterization of the quilt:

o Automatic(Default) The system defines the parameterization.

Note: If the system cannot perform a transformation, use the Aided or Manual option.

o AidedSelect four vertices or datum points on the quilt boundary. The system uses these fourpoints to create a reference surface.

o ManualSpecify a reference surface to use for parameterization. The reference surface must exist the model prior to the operation.

5. Optionally, you can position the flattened quilt so it lies in the XY plane of a selected coordinate systemand orient the quilt as desired. To do this, select Specify Placement and specify the following:

o To define the XY plane, select or create a coordinate system.

o To orient the flattened quilt in the XY plane, select a point on the original quilt. The system creates

vector from the origin point to the selected x-direction point. The system orients the flattened quilt talign this vector with the x-axis of the plane.

6. Specify the number of steps for each direction of the quilt by typing an integer from 10 to 100 in theNumber of Steps 1 and Number of Steps 2 boxes respectively. The number of steps determines thedensity of the grid used for the surface parameterization. When you click in the respective box, a redarrow shows the corresponding direction of parameterization.

7. Click to create the feature.

Use Flatten Quilt to unfold a quilt.

To unfold the quilt, the system creates a uniform parameterization of the surface and then unfolds it,preserving the parameterization of the original quilt. To create the parameterization of the source quilt, thesystem uses a reference surface that approximates and encloses the source quilt. The system can define threference surface internally, or you can create a surface and then use it for parameterization.

Note: A Flatten Quilt feature is a single surface of the type Plane.

The system unfolds the quilt with respect to the fixed origin point that you select. By default, the systemplaces the flattened quilt on the plane that is tangent to the original quilt at the origin point.

Optionally, you can specify a different placement plane and orient the quilt as desired. To place the quilt,select a coordinate system whose XY plane will be the placement plane. To orient the quilt, select a datumpoint on the quilt. The system creates a vector from the origin point to specified datum point and aligns thisvector with the x-axis of the coordinate system.

Consider the following rules and recommendations:

The origin and the x-direction points must lie on the source quilt.

Surfaces of the source quilt must be tangent to each other.

For the Manual transformation method, a reference surface must be present in the model before yostart the Flatten Quilt operation.

When you use the Aided option, the corner points must lie on the boundaries of the source quilt or

their extensions. If the system fails to transform the quilt using the Automatic and Aided option, click the Manual

transformation method and select a reference surface that you have previously created.

Tip: You can create a reference surface for a quilt as a boundary blend by using the source quilt boundari

and several additional curves to approximate the original quilt.

Example: Flattening a Quilt

Case 1: Flattening a Quilt Using the Default Placement

This figure shows a quilt to flatten. The datum point PNT0 is selected as the origin point.



The next figure shows the flattened quilt (shown on top of the source quilt) in its default placement. Notice

that the flattened quilt is tangent to the source quilt at the origin point PNT0.

Case 2: Flattening a Quilt with the Placement Option

The next figure shows a quit to flatten. The datum point PNT0 is selected as the origin point. The coordinatesystem CS1 and datum point PNT1 are used for positioning the resulting quilt.

The next figure shows the results of the Flatten Quilt operation. The flattened quilt lies in the XY plane of thcoordinate system CS1. A vector created from PNT0 to PNT1 is aligned with the x-axis of the XY plane.

To Create a Solid Bend

After you have created a flattened quilt, you can use Solid Bend to flatten curves and bend a solid.

1. Click Insert > Advanced > Bend Solid. The SOLID BEND dialog box opens.

2. Select a Flatten Quilt feature.

3. Specify the Bend Options by choosing one of the following options:

o Flatten CurvesTransform datum curves from the original quilt to the flattened quilt.

o Bend SolidTransform a solid from the flattened quilt to the original quilt.

4. If you are flattening curves, select the curves on the flat quilt that you want to transform. To reselect thcurves, click Source Curves.

5. Click to create the feature.

Using Solid Bend

You can use Bend Solid to:

Flatten (unbend) curves

Bend solids

Use Bend Solid to transform the solid that lies in the vicinity of the flattened quilt to the source quilt.Alternatively, you can transfer datum curves from the source quilt to the flattened quilt using the FlattenCurves option.

Consider the following restrictions:

Selected curves must reference the surfaces of the source quilt of the Flatten Quilt feature.


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5. When finished tweaking, click in the ModifySurface dialog box.

6. Click OK in the dialog box to create the freeform feature.

To Sketch a Boundary Region

1. Click Insert > Advanced > Surface Free Form.

2. The SURFACE: Free Form dialog box opens.

3. Click Sket On Pln and Done on the FORM OPTS menu.

4. Select the sketching plane and specify model references. Sketch a circle or a rectangle.

5. The system displays a grid of red isolines in the first direction. Enter the number of control curves inthe direction of the arrow.

6. The system displays another grid of isolines in the second direction. Enter the number of controlcurves in the direction of the arrow.

7. The Modify Surface dialog opens. You can select a point on the grid to drag, or optionally you canuse the Modify Surface dialog box to define the Poly Motion region, turn on the dynamic diagnostics, ouse sliders.

8. When finished tweaking, click in the Modify Surface dialog box.


To Create a Freeform Quilt

1. Click Insert > Advanced > Surface Free Form. The SURFACE: Free Form dialog box opens.

2. Select an existing surface to provide the solid or quilt reference (base) surface for the freeform

surface definition. The system displays a grid of red isolines in the first direction.

3. Enter the number of control curves in the first direction. The system displays a grid of red isolines inthe second direction.

4. Enter the number of control curves in the second direction. The Modify Surface dialog box opens.You can select a point on the grid to drag, or optionally you can use the Modify Surface dialog box todefine the Poly Motion region, turn on the dynamic diagnostics, or use sliders.

5. When finished tweaking, click in the Modify Surface dialog box.


To Copy a Trimmed Portion of the Quilt

You can copy a trimmed portion of a quilt (surface patch). To define the portion of the quilt to copy, youmust select edges and curves that form a single closed loop.

1. Select the quilt from which you want to copy a patch.

2. Click Edit > Copy. The dashboard appears.

3. Click Options and click Copy Inside boundary.

4. Click inside the Boundary curve collector. Select a closed contour as the boundary of the patch.

5. Click . The system creates a new quilt on top of the selected portion of the quilt.

surface print

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