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Aerospace Sheetmetal Design

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Aerospace Sheetmetal Design

Site Map Preface Using this Guide Where to Find More Information

Basic Tasks Managing the Default Parameters Creating a Web Creating a Flange Creating a Joggle Creating a Cutout Creating an Extruded Hole Creating a Bead Unfolding Reference Elements Creating Constraints Workbench Description Menu Bar Aerospace Sheet Metal Toolbar Constraints Toolbar Reference Elements Toolbar Specification Tree Customizing Glossary Index

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Preface
Aerospace Sheetmetal provides an associative feature-based modeling enabling to design sheetmetal parts in concurrent engineering between the unfolded or folded part representation. Aerospace Sheetmetal allows you to define a part using predefined features. Both the folded geometry and the flattened geometry can be computed from the feature specifications. Using this Guide Where to Find More Information

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Using this Guide
This guide is intended for the user who needs to become quickly familiar with the CATIA Version 5 Aerospace Sheetmetal Design product. The user should be familiar with basic Version 5 concepts such as document windows, standard and view toolbars.

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Where to Find More Information
Prior to reading this book, we recommend that you read the Infrastructure User Guide. The Part Design, the Assembly Design and the Generative Drafting, the Sketcher and the Generative Shape Design documentations may prove useful. Finally, you can read the Sheet Metal Production and the Sheet Metal Design documentations to find out more about that product and to fully use the interoperability between these products. Conventions

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Basic Tasks
The Basic Tasks section explains how to create and modify various kinds of features. Managing the Default Parameters Creating a Web Creating a Flange Creating a Joggle Creating a Cutout Creating an Extruded Hole Creating a Bead Unfolding Reference Elements

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Managing the Default Parameters
This section explains and illustrates how to use or modify various kinds of features. The table below lists the information you will find. Using Aerospace Sheetmetal Design assumes that you are in a CATPart document.

Edit the parameters: select the Parameters tab and the element thickness and bend radius values. Define the bend allowance: select the Bend Allowance tab and define the allowance value (K factor).

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Editing the Sheet and Tool Parameters
This section explains how to change the different sheet metal parameters needed to create your first feature. 1. Click the Sheet Metal Parameters icon . The Sheet Metal Parameters dialog box is displayed.

2. Change the Thickness if needed. 3. Change the Bend Radius if needed. The Bend radius corresponds to the internal radius. Convention dictates that the inner angle between the two elements is used to define the bend. It can vary from 0° to 180° exclusive. This angle is constant and the bend axis is rectilinear. 4. Press the Sheet Standards Files... button to access to the company defined standards, if need be. For more information, refer to the Customizing section. 5. Click OK to validate the Sheet Metal Parameters. In Sheetmetal Design workbench, when the Check all bend radius button is checked, and you click OK in the Sheet Metal Parameters dialog box, a list is displayed with all the bends the part that do not use the standard Bend Radius value as defined in step 3.

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Defining the Bend Allowance
This section explains the calculations related to folding/unfolding operations. 1. Click the Parameters icon . The Sheet Metal Parameters dialog box is displayed. The fourth tab concerns the bend allowance.

When a bend is unfolded, the sheet metal deformation is represented by the bend allowance V, defined by the formula: L=A+B+V where: L is the total unfolded length A and B the dimensioning lengths as defined on the figures below:

bend < 90°

bend > 90°

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Another way to compute the sheet metal deformation is the neutral fiber definition (K Factor): W = α * (R + k * T) where: W is the flat bend width R the inner bend radius T the sheet metal thickness α the inner bend angle in radians. If β is the opening bend angle in degrees: α = π * (180 - β) / 180

Physically, the neutral fiber represents the limit between the material compressed area inside the bend and the extended area outside the bend. Ideally, it is represented by an arc located inside the thickness and centered on the bend axis. Therefore the K Factor always has a value between 0 and 0.5. When you define the sheet metal parameters, a literal feature defines the default K Factor, according to the DIN standard: K = (0.65 + log(R / T) / 2) / 2 This formula can be deactivated or modified using Knowledge Advisor workbench. When a bend is created, the bend K Factor and the bend allowance literals are created. Two cases may then occur: If the Sheet Metal K Factor has an activated formula and uses the default bend radius as input parameter, the same formula is activated on the bend K Factor with the bend radius as input. Else the bend K Factor is a formula equal to the Sheet Metal K Factor.

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The bend allowance literal is equal to a formula representing the use of the bend K Factor. This formula is fairly complex and it is strongly recommended not to delete it. V = α * (R + k * T) - 2 * (R + T) * tan ( min(π/2,α) / 2) Though it is possible to deactivate the formula to enter a fixed value. Finally, the bend flat width is computed from the bend allowance value.

In Sheetmetal Design workbench, the bend allowance can be locally redefined when creating bends from walls or generating bends automatically.

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Creating a Web
This section explains how to create a web. The web is the main feature of an Aerospace Sheetmetal part: there is always one (and only one) web. Open the Web1.CATPart document. 1. Click the Web icon .

The Web definition dialog box is displayed.

2. In the Support tab, select a the support geometry (here in blue). It can either be: a plane (example from Web from open geometry) The Web Material Direction is displayed, perpendicular to the geometrical support. You can reverse the direction by clicking the arrow.

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a close sketch (example from Web from close sketch) The Web Material Direction is displayed, perpendicular to the geometrical support. You can reverse the direction by clicking the arrow. When the contour is defined from a close sketch, the web is directly computed from this sketch.

3. In the Boundary tab, in the case of an open geometry, select the elements that limit the support geometry. It can either be: a sketch a list of elements (curves, surfaces, or planes) The elements must be selected consecutively. When the contour is defined by a list of geometrical elements, the following operations are performed: the curves are projected on the web geometrical support the surfaces are intersected with the web geometrical support

4. Click OK.

The web is created and the specification tree is updated accordingly.

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Creating a Flange
This section explains how to create a flange, that is a feature based on a web or an existing flange that enables to stiffen the part.

The CATPart is still open from the previous task. 1. Click the Flange icon .

The Flange definition dialog box is displayed.

2. In the Base Feature tab, choose the Bend Radius type (Constant). It is set to the minimum bend radius of the part. 3. You can modify the fillet Radius value. The fillet has a constant radius: this value is initialized with the value of the part standard Bend Radius. It can be increased, but not decreased. You can change the driving equation by clicking the icon.

The Formula Editor dialog box opens, you can modify the dictionary and the parameters. You may need to deactivate the formula using the contextual menu on the field and choosing Formula -> Deactivate before editing the value. 4. Choose the web you created in the previous task as the Base Feature.

AerospaceThe base feature is Sheetmetal Design

always a web.

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5. In the Support tab, choose the geometrical support. It can either be a surface or a plane. Exact: the selected surface is to be used for the creation of the flange. Approximation: the selected surface is approximated using a surface rule. This mode enables you to compute the maximum deviation between the approximated surface and the approximating surface.

The approximation length is calculated according to the computation of the Support Geometry elements. Therefore, the specification of an element is requested. Angle: the surface of the flange can also be defined by a curve and an angle. The angle can be constant or you can change the value by clicking the up and down arrows.

The red angle is the angle taken into account when creating the flange.

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6. Choose the Support Geometry. The vectors show the Base Feature Direction, the Direction and the Material Direction according to the direction of the geometrical support of the flange. You can modify the directions by clicking the arrows.

The surfaces (or curves) used to define the support surface must be continuous in point and tangency 7. In the EOP (Edge Of Part) tab, you can define the EOP either with: a length defined from OML (Outer Mold Line): length of the curve defining the top of the flange. an element FD (Folded): boundary element (either a surface that intersects with the flange surface, or a wire projected on the flange surface)

In our task, we chose 8. Click OK. The Flange is created and the specification tree is updated accordingly.

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Flange with a length from OML of 10 mm In the Sides and Corners tab, you can choose to define the:

Flange with Plane.3 (in pink) as Element FD

sides (intersection between the Base Feature and a curve) as: standard: they are automatically defined at the web limit and the perpendicular plans are kept (in this case, the user does not have to define them) none: no side computed (only the EOP is able to define the contour of the Flange) element: they can be defined by a geometrical element FD (curve or surface). These elements can be defined on the folded representation of the part.

The example above shows a flange defined with Plane.1 (in orange) as Side 1

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corners (angle defined between the EOP and the sides) as: none: no corner computed (only the EOP is able to define the contour of the Flange) corner: between the side and the EOP (defined with a radius value)

The example above shows a flange defined with Sides 1 and 2 as Standard, and Corners 1 and 2 of 10mm each. In the case the user does not define a flange side, the latter is automatically computed at the Web limit, perpendicular to the OML. In the case no corner is defined, the side and the EOP are simply relimiting each other The sides of the fillet are continuous in tangency with the contour of the web and the sides of the flange.

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Creating a Joggle
This section explains how to create a joggle, that is a feature which causes the flange to be locally deformed. The joggle is a feature which cannot exist alone, it is always defined on a flange. The CATPart is still open from the previous task. 1. Click the Joggle . icon

2. Select the flange as the support. The Support of the joggle is not automatically set to the last created flange.

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3. Choose a plane as the Joggle Plane, here we choose Plane3. The blue curve defines the boundary of the web. The vectors show you the joggle directions: - The vector on the flange support determines the depth direction - The vector on the joggle plane determines the side on which the joggle is to

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be created 4. You can modify the following parameters of the joggle by clicking the up and down arrows. depth: offset at the support surface showed as dotted lines The dotted lines must remain inside the blue curve. runnout: surface between the original surface of the flange and the new surface clearance fillet radiuses If you modify the depth, the runnout adjusts automatically. You can reverse the runnout direction either by clicking the red arrow or by clicking the Invert Runnout Dir button in the dialog box. You can reverse the depth direction either by clicking the red arrow or by clicking the Invert Depth Dir button in the dialog box. 5. Click OK. The joggle is created and the specification tree is updated accordingly.

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Creating a Cutout
In this task, you will learn how to: open a sketch on an existing face define a closed contour in order to create a cutout. You can create a cutout defined either by a sketch or an open geometry. Creating a cutout consists in extruding a profile and removing the material resulting from the extrusion. CATIA lets you choose the shape of material to be removed, the limits of creation as well as the direction of extrusion. Open the Cutout1.CATPart document. 1. Select the surface from the geometry area to define the working plane. 2. Click the Sketcher icon .

3. Click the Elongated Hole icon

to create the contour.

To access the oblong profile, click the black triangle on the Rectangle icon. It displays a secondary toolbar.

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4. Click to create the first point and drag the cursor. 5. Click to create the second point. The first semi-axis of the profile is created. 6. Drag the cursor and click to create the third point. The second semi-axis is created and the oblong profile is displayed.

7. Click the CutOut icon

.

The CutOut Definition dialog box is displayed and a cutout is previewed with default parameters. The vectors show the side and the direction of the cutout.

8. Select the type (here we chose Up to next). Several limit types are available: Dimension: the cutout depth is defined by the specified value The depth corresponds to the web thickness. Please refer to Editing the Sheet and Tool Parameters. Up to next: the limit is the first face the application detects while extruding the profile. This face must stops the whole extrusion, not only a portion of it, and the hole goes through material. Up to last: the application will limit the cutout onto the last possible face encountered by the extrusion.

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9. Select the profile you created using the sketcher (here Sketch.2). The Reverse side option lets you choose between removing the material defined within the profile, which is the application's default behavior, or the material surrounding the profile.

10. Click More>> to display the maximum information. The Direction is already selected (Sketch.2). If not, it must be perpendicular to the web.

11. Select the Support (here we chose the web) 12. Click OK. The cutout is created and the specification tree is updated accordingly.

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Creating an Extruded Hole
This task shows you how to create an extruded hole by specifying the punch geometrical parameters. Open the ExtrudedHole1.CATPart. 1. Click the Extruded Hole icon .

2. Select the surface where you want to place the hole. A grid is displayed to help you position the extruded hole and the Extruded Hole Definition dialog box opens, providing default values.

3. Change the value in the different fields, if needed: Height H Radius R Angle A Diameter D

4. Click Apply to preview the extruded hole.

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5. Click OK to validate.

The extruded hole is created and the specification tree is updated accordingly.

Check the No radius option to deactivate the Radius R value, and to create the extrude hole stamp without a fillet.

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Creating a Bead
This task shows you how to create a bead, that is a local deformation in the web. Open the Bead1.CATPart. 1. Click the Bead icon 2. Select the profile where you want to place the bead (here Sketch.2). The Bead definition dialog box is displayed. .

3. Change the value in the different fields, if needed: Height H Radius R Section Radius R1 End Radius R2 The Sketch is automatically set to the sketch you chose. Its support is highlighted and the vector for the direction of the bead is shown in the model.

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A preview of the bead appears and a vector shows its direction.

4. Click Apply to preview the bead. 5. Click OK to validate. The bead is created and the specification tree is updated accordingly.

The vector cannot be reverted until the bead spine is defined. Check the No radius option to deactivate the Radius R value, and to create the extrude hole stamp without a fillet.

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Unfolding
Unfolded Sheet Metal parts can be displayed in two ways: Folded/Unfolded View Access Concurrent Access

Each Sheet Metal feature is created in a given view: folded, or unfolded. Editing a feature must be done in its definition view. If not, a message is automatically issued, prompting you to change views, before editing the feature.

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Folded/Unfolded View Access
This task shows how to unfold the part. 1. Click the Unfold icon .

The part is unfolded according to the reference wall plane or web, as shown below.

2. Click this icon

again to refold the part for the next task.

Bend limits and stamping are now displayed in the unfolded view. However, cutouts created on stamps are not. When designing in context, if a CATProduct document contains several Sheetmetal parts, only one part can be visualized in the unfolded view at a time.

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Concurrent Access

This functionality is P2 for Sheetmetal Design. This task explains how to display the Sheet Metal part in two windows: one with the folded view, one with the unfolded view. Any modification in one window is displayed in the other window. 1. Click the Multi-view icon .

The part is unfolded in a second window. 2. Choose the Window -> Tile Horizontally menu item. Both windows are tiled. Activate the window in which you want to work.

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Any modification in one view is taken into account in the other view enabling the user to make modifications in the best possible context. In the multi-view mode as in the standard unfolded view, all constraints are displayed in the geometrical views. Once in the Multi-view mode, the standard icon Unfold is not longer available. The Multi-view function is not available from a standard unfolded view. Only parts with bends can be unfolded. Cutting faces and open faces are not displayed in Multi-view mode.

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Reference Elements
You can create wireframe elements within the Aerospace Sheetmetal Design workbench: Create points: click this icon, choose the point creation type, and specify parameters Create lines: click this icon, choose the line creation type, and specify parameters Create planes: click this icon, choose the plane creation type, and specify parameters

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Creating Points
This task shows the various methods for creating points: by coordinates on a curve on a plane on a surface at a circle center tangent point on a curve between Open the Points3D-1.CATPart document. 1. Click the Point icon .

The Point Definition dialog box appears. 2. Use the combo to choose the desired point type.

Coordinates Enter the X, Y, Z coordinates in the current axis-system. Optionally, select a reference point. The corresponding point is displayed.

When creating a point within a user-defined axis-system, note that the Coordinates in absolute axis-system check button is added to the dialog box, allowing you to be define, or simply find out, the point's coordinates within the document's default axis-system.

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On curve Select a curve Optionally, select a reference point. If this point is not on the curve, it is projected onto the curve. If no point is selected, the curve's extremity is used as reference.

Select an option point to determine whether the new point is to be created: at a given distance along the curve from the reference point a given ratio between the reference point and the curve's extremity. Enter the distance or ratio value. If a distance is specified, it can be: a geodesic distance: the distance is measured along the curve an Euclidean distance: the distance is measured in relation to the reference point (absolute value).

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The corresponding point is displayed. You can also: click the Nearest extremity button to display the point at the nearest extremity of the curve. click the Middle Point button to display the mid-point of the curve.

use the Reverse Direction button to display: the point on the other side of the reference point (if a point was selected originally) the point from the other extremity (if no point was selected originally). click the Repeat object after OK if you wish to create equidistant points on the curve, using the currently created point as the reference, as described in Creating Multiple Points in the Wireframe and Surface User's Guide . You will also be able to create planes normal to the curve at these points, by checking the Create normal planes also button, and to create all instances in a new Open Body by checking the Create in a new open body button. If the button is not checked the instances are created in the current Open Body. If the curve is infinite and no reference point is explicitly given, by default, the reference point is the projection of the model's origin If the curve is a closed curve, either the system detects a vertex on the curve that can be used as a reference point, or it creates an extremum point, and highlights it (you can then select another one if you wish) or the system prompts you to manually select a reference point.

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On plane Select a plane. Optionally, select a point to define a reference for computing coordinates in the plane. If no point is selected, the projection of the model's origin on the plane is taken as reference.

Furthermore, the reference direction (H and V vectors) is computed as follows: With N the normal to the selected plane (reference plane), H results from the vectorial product of Z and N (H = Z^N). If the norm of H is strictly positive then V results from the vectorial product of N and H (V = N^H). Otherwise, V = N^X and H = V^N. Would the plane move, during an update for example, the reference direction would then be projected on the plane. Click in the plane to display a point.

On surface Select the surface where the point is to be created.

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Optionally, select a reference point. By default, the surface's middle point is taken as reference. You can select an element to take its orientation as reference direction or a plane to take its normal as reference direction. You can also use the contextual menu to specify the X, Y, Z components of the reference direction. Enter a distance along the reference direction to display a point. Circle center Select a circle, circular arc, or ellipse.

A point is displayed at the center of the selected element.

Tangent on curve Select a planar curve and a direction line. A point is displayed at each tangent.

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The Multi-Result Management dialog box is displayed because several points are generated. Click YES: you can then select a reference element, to which only the closest point is created. Click NO: all the points are created.

Between Select any two points.

Enter the ratio, that is the percentage of the distance from the first selected point, at which the new point is to be. You can also click Middle Point button to create a point at the exact midpoint (ratio = 0.5). Use the Reverse direction button to measure the ratio from the second selected point.

If the ratio value is greater than 1, the point is located on the virtual line beyond the selected points. 3. Click OK to create the point. The point (identified as Point.xxx) is added to the specification tree.

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Creating Lines
This task shows the various methods for creating lines: point to point point and direction angle or normal to curve tangent to curve normal to surface bisecting Open the Lines1.CATPart document. 1. Click the Line icon .

The Line Definition dialog box appears. 2. Use the combo to choose the desired line type.

A line type will be proposed automatically in some cases depending on your first element selection. Point - Point Select two points.

A line is displayed between the two points. Proposed Start and End points of the new line are shown.

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If needed, select a support surface. In this case a geodesic line is created, i.e. going from one point to the other according to the shortest distance along the surface geometry (blue line in the illustration below). If no surface is selected, the line is created between the two points based on the shortest distance (pink line in the illustration below).

Specify the Start and End points of the new line, that is the line endpoint location in relation to the points initially selected. These Start and End points are necessarily beyond the selected points, meaning the line cannot be shorter than the distance between the initial points. Check the Mirrored extent option to create a line symmetrically in relation to the selected Start and End points. The projections of the 3D point(s) must already exist on the selected support.

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Point - Direction Select a reference Point and a Direction line. A vector parallel to the direction line is displayed at the reference point. Proposed Start and End points of the new line are shown.

Specify the Start and End points of the new line. The corresponding line is displayed.

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The projections of the 3D point(s) must already exist on the selected support.

Angle or normal to curve Select a reference Curve and a Support surface containing that curve. Select a Point on the curve. Enter an Angle value.

A line is displayed at the given angle with respect to the tangent to the reference curve at the selected point. These elements are displayed in the plane tangent to the surface at the selected point. You can click on the Normal to Curve button to specify an angle of 90 degrees. Proposed Start and End points of the line are shown. Specify the Start and End points of the new line. The corresponding line is displayed.

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Click the Repeat object after OK if you wish to create more lines with the same definition as the currently created line. In this case, the Object Repetition dialog box is displayed, and you key in the number of instances to be created before pressing OK. As many lines as indicated in the dialog box are created, each separated from the initial line by a multiple of the angle value.

You can select the Geometry on Support check box if you want to create a geodesic line onto a support surface. The figure below illustrates this case.

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Geometry on support option not checked

Geometry on support option checked

Tangent to curve Select a reference Curve and a point or another Curve to define the tangency. if a point is selected (mono-tangent mode): a vector tangent to the curve is displayed at the selected point. If a second curve is selected (or a point in bi-tangent mode), you need to select a support plane. The line will be tangent to both curves. When several solutions are possible, you can choose one (displayed in red) directly in the geometry, or using the Next Solution button.

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Line tangent to curve at a given point

Line tangent to two curves

Specify Start and End points to define the new line. The corresponding line is displayed.

Normal to surface Select a reference Surface and a Point. A vector normal to the surface is displayed at the reference point. Proposed Start and End points of the new line are shown.

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Specify Start and End points to define the new line. The corresponding line is displayed.

Bisecting Select two lines. Their bisecting line is the line splitting in two equals parts the angle between these two lines. Select a point as the starting point for the line. By default it is the intersection of the bisecting line and the first selected line.

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Select the support surface onto which the bisecting line is to be projected, if needed. Specify the line's length in relation to its starting point (Start and End values for each side of the line in relation to the default end points). The corresponding bisecting line, is displayed. You can choose between two solutions, using the Next Solution button, or directly clicking the numbered arrows in the geometry.

3. Click OK to create the line. The line (identified as Line.xxx) is added to the specification tree.

Regardless of the line type, Start and End values are specified by entering distance values or by using the graphic manipulators. Check the Mirrored extent option to create a line symmetrically in relation to the selected Start point. In most cases, you can select a support on which the line is to be created. In this case, the selected point(s) is projected onto this support. You can reverse the direction of the line by either clicking the displayed vector or selecting the Reverse Direction button (not available with the point-point line type).

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Creating Planes
This task shows the various methods for creating planes: offset from a plane parallel through point angle/normal to a plane through three points through two lines through a point and a line through a planar curve normal to a curve tangent to a surface from its equation mean through points

Open the Planes1.CATPart document. 1. Click the Plane icon .

The Plane Definition dialog box appears. 2. Use the combo to choose the desired Plane type.

Once you have defined the plane, it is represented by a red square symbol, which you can move using the graphic manipulator. Offset from plane Select a reference Plane then enter an Offset value. A plane is displayed offset from the reference plane.

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Use the Reverse Direction button to reverse the change the offset direction, or simply click on the arrow in the geometry.

Click the Repeat object after OK if you wish to create more offset planes . In this case, the Object Repetition dialog box is displayed, and you key in the number of instances to be created before pressing OK. As many planes as indicated in the dialog box are created (including the one you were currently creating), each separated from the initial plane by a multiple of the Offset value.

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Parallel through point Select a reference Plane and a Point.

A plane is displayed parallel to the reference plane and passing through the selected point.

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Angle or normal to plane Select a reference Plane and a Rotation axis. This axis can be any line or an implicit element, such as a cylinder axis for example. To select the latter press and hold the Shift key while moving the pointer over the element, then click it. Enter an Angle value.

A plane is displayed passing through the rotation axis. It is oriented at the specified angle to the reference plane. Click the Repeat object after OK if you wish to create more planes at an angle from the initial plane. In this case, the Object Repetition dialog box is displayed, and you key in the number of instances to be created before pressing OK. As many planes as indicated in the dialog box are created (including the one you were currently creating), each separated from the initial plane by a multiple of the Angle value. Here we created five planes at an angle of 20 degrees.

Through three points Select three points.

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The plane passing through the three points is displayed. You can move it simply by dragging it to the desired location.

Through two lines Select two lines.

The plane passing through the two line directions is displayed. When these two lines are not coplanar, the vector of the second line is moved to the first line location to define the plane's second direction.

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Through point and line Select a Point and a Line.

The plane passing through the point and the line is displayed.

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Through planar curve Select a planar Curve.

The plane containing the curve is displayed.

Tangent to surface Select a reference Surface and a Point.

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A plane is displayed tangent to the surface at the specified point.

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Normal to curve Select a reference Curve. You can select a Point. By default, the curve's middle point is selected.

A plane is displayed normal to the curve at the specified point.

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Mean through points Select three or more points to display the mean plane through these points.

It is possible to edit the plane by first selecting a point in the dialog box list then choosing an option to either: Remove the selected point Replace the selected point by another point.

Equation Enter the A, B, C, D components of the Ax + By + Cz = D plane equation.

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Use the Normal to compass button to position the plane perpendicular to the compass direction.

Use the Parallel to screen button to parallel to the screen current view.

3. Click OK to create the plane. The plane (identified as Plane.xxx) is added to the specification tree.

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Creating Constraints
This task shows how to set geometric constraints on geometric elements. Such a constraint forces a limitation. For example, a geometric constraint might require that two lines be parallel. To set a constraint between elements: 1. Multi-select two or three elements to be constrained. 2. Click the Constraint defined in dialog box . icon The Constraint Definition dialog box appears indicating the types of constraint you can set between the selected elements. 3. Select one of the available options to specify that the corresponding constraint is to be made. 4. Click OK. The corresponding constraint symbol appears on the geometry. To set a constraint on a single element: 1. Select the element to be constrained. 2. Click the Constraint icon .

The corresponding constraint symbol appears on the geometry.

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Workbench Description
The Aerospace Sheetmetal Design application window looks like this: Click the hotspots to display the related documentation.

Menu Bar Aerospace Sheetmetal Toolbar Constraints Toolbar Reference Elements Toolbar Specification Tree

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Menu Bar
The various menus and menu commands that are specific to Aerospace Sheetmetal Design are described below.

Start

File

Edit

View

Insert

Tools

Windows

Help

Tasks corresponding to general menu commands are described in the Infrastructure User's Guide. Refer to the Menu Bar section.

Insert
For... Sketcher See... Refer to the Sketcher User's Guide. Sheet Metal Parameters See Managing the Default Parameters Web... Flange... Joggle... Fold/Unfold CutOut... Stampings Constraint See Creating a Web See Creating a Flange See Creating a Joggle See Insert -> Unfold See Creating a Cutout See Insert -> Stampings See Setting Constraints in the Part Design User's Guide

Insert -> Unfold
For... Unfold... Multi Viewer... See... See 3D View See Concurrent Access

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Insert -> Stampings
For... Extruded Hole... Bead... See... See Creating an Extruded Hole See Creating a Bead

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Aerospace Sheetmetal Toolbar

See Managing the Default Parameters See Creating a Web See Creating a Flange See Creating a Joggle See Unfolding the Part See Creating a Cutout See Creating an Extruded Hole See Creating a Bead

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Constraints Toolbar

See Setting Constraints from the Part Design User's Guide

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Reference Elements Toolbar

See Creating Points See Creating Lines See Creating Planes

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Specification Tree
Within the Aerospace Sheetmetal Design workbench, you can generate a number of features that are identified in the specification tree by the following icons. Further information on general symbols in the specification tree are available in Symbols Used in the Specification Tree. Sketch Sheet Metal Parameters Web Flange Joggle Point Line Plane Cutout Extruded Hole Bead

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Customizing
This section describes how to customize settings. The task described here deals with permanent setting customizing.

Using Aerospace Sheet Metal Standards Files
This task explains how to access company standards files. Open a new document. 1. Click the Sheet Metal Parameters icon . The Sheet Metal Parameters dialog box opens. 2. Select the Sheet Standards Files... button. The Sheet Metal Part Samples window is displayed.

3. Indicate the path to the Sheet Metal tables.

These files are available under .xls or.txt format.

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4. Click Open. In the Sheet Metal Parameters dialog box, the Design Table icon appears opposite the Thickness and Bend radius fields. The parameters are now in gray, indicating that you can no longer modify the values. 5. Click the Thickness Design Table icon and select line 1.

This scenario can work when the .CATPart document and all reference table files (Design & Radius) are located in the same directory. This directory is the current one when the Design table is created, and also when the .CATPart is open.

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However, generally speaking, you must reference the complete path indicating where the radius table files are to be found in the RadiusTable column. In this case, regardless of the current directory, the correct tables are located when re-opening the .CATPart document. Using the Tools -> Options -> General -> Document tab, Other Folders option, you can specify where the files are located. Refer to Document. 6. Click OK. The parameter values are updated in the Sheet Metal Parameters dialog box. 7. Click the Bend Radius Design Table icon . 8. Select line 2 and click OK. The parameter values are updated in the Sheet Metal Parameters dialog box. 9. Create a bend. The Bend Definition dialog box displays a design table for the Bend Radius. The default mode, it's to say the formula: Bend Radius =

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Part Radius is deactivated. Let's see the Bend Radius Table, using this icon

.

It shows the Bend Radius and the corresponding Bend Table.

10. Click OK. If the Angle value is contained in the Bend Table, the Bend Allowance uses the corresponding value. If not, the Bend Allowance is computed according to the KFactor.

Using the Sheet Metal Design Tables:
Steps 1 to 4 are identical. 5. Click the Design Table icon and select a line.

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6. Click OK. The parameter values are updated in the Sheet Metal Parameters dialog box. At that time, the parameters Thickness and Bend radius are driven by the design table. They are now in gray, indicating that you can no longer modify the values. Note that if you create a bend, there is no design table: it's the formula which is used. To disable the access to design tables: Select the Tools -> Options -> Part -> Display tab and check Relations: the Design Table icon is displayed in the specification tree. Right-click this icon: the contextual menu appears. Select SheetMetal Thickness Table object -> Deactivate The relation is no longer used but still exists. It can be activated at any time.

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Glossary
bead A local deformation in the web.

C
corner relief A feature defined on two flanges, which forms a corner. It relimits the two flanges and redefines the outer contour of the web between the two flanges. cutout A feature corresponding to an opening through a feature. The shape of the opening corresponds to the extrusion of a profile.

D
depth Dimension specifying the geometry of a bead or a joggle. edge of part Element (usually a curve), which defines the length/height of a flange.

F
feature flange Characteristic form. Features are used to define a part. A feature along the outer section of the web. It is used to connect to another product or to stiffen the part.

J
joggle Feature which causes the flange to be locally deformed. Usually because the skin which is connected to the web is locally enforced by a strip or stringer (L or T profile).

K
K factor Determines the computation of the unfolded length of flanges.

P
pattern A set of similar features repeated in the same feature or part.

W
web Main constituent of a hydroformed part. Many other features (flanges, holes, etc.) are defined onto this feature.

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Index
B
bead

C
command Bead Constraint Defined in Dialog Box Single Constraint Cutout Extruded Hole Flange Joggle Line Plane Point Web constraint create create bead constraint cutout extruded hole

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flange joggle lines plane point web wireframe elements cutout

D
design tables

E
elements Aerospace Sheetmetal Design Extruded Hole command extruded hole create extruded hole

F
flange folding

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J
joggle

L
line lines create

M
manage Sheet Metal parameters

P
plane Plane command Point command point

R
reference elements

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S
Aerospace Sheetmetal Design elements Sheet Metal parameters manage

U
unfold / fold

W
web wireframe elements create

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