Catia v5r12 mechanical design solutions 3

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CATIA Version 5 Release 12 User's Documentation Home Page

Version 5 Release 12

© Dassault Systèmes 1994-2003 All rights reserved

CATIA Documentation

Wireframe & Surface

Entering the Workbench

Creating Wireframe Geometry

Creating First Loft

Creating Swept Surfaces

Creating Second Loft

Joining the Surfaces

Closing the Surfaces

Basic Tasks

Creating Wireframe Geometry

Creating Points Creating Multiple Points Creating Lines

Creating an Axis Creating Polylines Creating Planes Creating Planes Between Other Planes Creating Circles

Creating Splines Creating a Helix Creating Corners Creating Connect Curves Creating Projections Creating Intersections Creating Surfaces

Creating Extruded Surfaces Creating Revolution Surfaces Creating Spherical Surfaces Creating Cylindrical Surfaces Creating Offset Surfaces

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and Surface

Version 5 Release 12

© Dassault Systèmes 1994-2003 All rights reserved

Wireframe & Surface

Creating Filling Surfaces Creating Swept Surfaces Creating Multi-section Surfaces Creating Blended Surfaces Performing Operations

Joining Surface or Curves Healing Geometry

Restoring a Surface Disassembling Elements Splitting Geometry Creating Boundary Curves Extracting Geometry Trimming Geometry Rotating Geometry Translating Geometry Performing a Symmetry on Geometry Transforming Geometry by Scaling Transforming Geometry by Affinity Transforming Elements From an Axis to Another Nearest Sub-element

Extrapolating Curves Extrapolating Surfaces Inverting the Orientation of Geometry Using Tools

Parents and Children Updating Your Design Defining an Axis System Working with a Support Creating Datums

Creating Constraints Editing Definitions Selecting Implicit Elements Creating Elements From An External File Copying and Pasting

Deleting Geometry Managing Open Bodies Hiding/Showing Open Bodies Checking Connections Between Surfaces

Wireframe & Surface

Applying a Material

Advanced Tasks

Managing PowerCopies

Creating PowerCopy Instantiating PowerCopy Measure Tools

Measuring Distances & Angles between Geometrical Entities Measuring Properties

The features-based approach offers a productive and intuitive design environment to capture and re-use design methodologies and specifications

As a scalable product, Wireframe and Surface can be used in cooperation with

companion products such as Part Design, Assembly Design and Generative Drafting The widest application portfolio in the industry is also accessible through

interoperability with CATIA Solutions Version 4 to enable support of the full product development process from initial concept to product in operation

The Wireframe and Surface User's Guide has been designed to show you how to

create and edit wireframe and surface features as well as hybrid parts There are

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Wireframe & Surface

often several ways to reach the final result This guide aims at illustrating these various possibilities

Using This GuideMore Information

Preface

The Wireframe and Surface workbench allows you to create wireframe construction elements during preliminary design and enrich existing 3D mechanical part design with wireframe and basic surface features As a complement to Part Design, this product meets the

requirements of solids-based hybrid modeling

The features-based approach offers a productive and intuitive design environment to capture and re-use design methodologies and specifications

As a scalable product, Wireframe and Surface can be used in cooperation with companion products such as Part Design, Assembly Design and Generative Drafting The widest

application portfolio in the industry is also accessible through interoperability with CATIA Solutions Version 4 to enable support of the full product development process from initial concept to product in operation

The Wireframe and Surface User's Guide has been designed to show you how to create and

edit wireframe and surface features as well as hybrid parts There are often several ways to reach the final result This guide aims at illustrating these various possibilities

Using This GuideMore Information

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Using This Guide

Using This Guide

This guide is intended for the user who needs to become quickly familiar with the Wireframe

and Surface product The user should be familiar with basic Version 5 concepts such as

document windows, standard and view toolbars

To get the most out of this guide, we suggest you start reading and performing the

The next sections deal with the creation and modification of various types of wireframe and surface geometry you will need to construct parts

You may also want to take a look at the section describing the Wireframe and Surface

workbench menus and toolbars

[ Up ] [ Next ]

More Information

Where to Find More Information

Prior to reading this guide, we recommend that you read the Infrastructure User's Guide.

The Part Design User's Guide and Assembly Design User's Guide may prove useful

Conventions

[ Back ] [ Up ]

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New Projection option allowing to specify a surface on which the point is projected normally to the plane

Creating Circles

Possibility to compute the default plane when one of the inputs is a planar curve for

Performing a Symmetry on Geometry

Two options (Creation or Modification) are now available to modify the symmetry

behavior

Transforming Geometry by Scaling

Two options (Creation or Modification) are now available to modify the scaling behavior

Transforming Geometry by Affinity

Two options (Creation or Modification) are now available to modify the affinity behavior

Transforming Elements From an Axis to Another

Two options (Creation or Modification) are now available to modify the axis behavior

Using Tools

Working With A Support

New commands are now concerned with the edition of parameters in the 3D geometry

Selecting Using Multi-Selection

Multi-selection is available when editing a single feature

Selecting Using Multi-Output

command

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Getting Started

Getting Started

Before getting into the detailed instructions for using CATIA Version 5 Wireframe and

Surface, the following tutorial aims at giving you a feel about what you can do with the product It provides a step-by-step scenario showing you how to use key functionalities.The main tasks described in this section are:

Entering the WorkbenchCreating Wireframe GeometryCreating a First Multi-section Surface

Creating Swept SurfacesCreating the Second Multi-section Surface

Joining the SurfacesClosing the Surfaces

This tutorial should take about ten minutes to complete

The final part will look like this:

Entering the Workbench

Entering the Workbench

This first task shows you how to enter the Wireframe and Surface workbench and open a design part

Before starting this scenario, you should be familiar with the basic commands common to

all workbenches These are described in the Infrastructure User's Guide.

1 Select Mechanical Design -> Wireframe and Surface Design from the Start

menu

The Wireframe and Surface workbench is displayed

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Entering the Workbench

2 Select File -> Open then select the GettingStartedWireframeAndSurface.CATPartdocument

The following design part is displayed

In the rest of this scenario, you will add to the existing elements of this part to complete the design

[ Up ] [ Next ]

Creating Wireframe Geometry

Creating Wireframe Construction Elements

This task shows you how create wireframe construction elements using the vertices of solids

The Line Definition dialog box appears

and the corresponding vertex on Pad 2

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Creating Wireframe Geometry

shown in the opposite figure

[ Back ] [ Up ] [ Next ]

Creating First Loft

Creating a First Multi-section SurfaceThis task shows how to create a multi-section surface

The Multi-section Surface Definition dialog box appears

pad as sections for the section surface

multi-Arrows must point the same way

on each side of the multi-section surface

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Creating First Loft

multi-section surface

[ Back ] [ Up ] [ Next ]

Creating Swept Surfaces

Creating Two Swept Surfaces

This task shows how to create two swept surfaces between opposite edges of the two pads

The Swept Surface Definition dialog box appears

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Creating Swept Surfaces

2 as profile

guide curve

then select the inclined line as second guide curve

surface

other side to create a second swept surface

In the opposite figure the previously

created lofted surface is hidden in

order to illustrate the swept surfaces

better

[ Back ] [ Up ] [ Next ]

Creating Second Loft

Creating a Second Loft SurfaceThis task shows how to create the second lofted surface at the bottom of the part

In the illustrations below, the first loft and both sweeps have been hidden

The Lofted Surface Definition dialog box appears

pads as sections for the loft

Make sure arrows point the same way

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Creating Second Loft

The specification tree is updated to show the created surfaces

[ Back ] [ Up ] [ Next ]

Joining the Surfaces

Joining SurfacesThis task shows how to join the lofted and swept surfaces

The Join Definition dialog box appears

The specification tree is updated to include the

joined surface

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Joining the Surfaces

[ Back ] [ Up ] [ Next ]

Closing the Surfaces

Closing the SurfacesThis task shows you how to create a solid by closing the joined surface.For this you must call up the Part Design workbench

The Part Design workbench is displayed

Closing the Surfaces

[ Back ] [ Up ]

Using Tools

When creating a geometric element, you often need to select other elements as

inputs When selecting a sketch as the input element, some restrictions apply,

depending on the feature you are creating

You should avoid selecting self-intersecting sketches as well as sketches containing heterogeneous elements such as a curve and a point for example

However, the following elements accept sketches containing non connex elements (i.e presenting gaps between two consecutive elements) as inputs, provided they are of the same type (homogeneous, i.e two curves, or two points):

and axis to axis

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Creating Wireframe Geometry

Creating Wireframe Geometry

Wireframe geometry is the geometry that helps you create features when needed Creating this geometry is a simple operation you can perform at any time

Two creation modes are available: either you create geometry with its history or not

information

Create points by coordinates: enter X, Y, Z coordinates

Create points on a curve: select a curve and possibly a reference point, and enter a length or ratio

Create points on a plane: select a plane and possibly a reference point, then click the plane

Create points on a surface: select a surface and possibly a reference point, an element

to set the projection orientation, and a length

Create points as a circle center: select a circle

Create points at tangents: select a curve and a line

Create point between another two points: select two points

Create multiple points: select a curve or a point on a curve, and possibly a reference point, set the number of point instances, indicate the creation direction or indicate the spacing between points

Create lines between two points: select two points

Create lines based on a point and a direction: select a point and a line, then specify the start and end points of the line

Create lines at an angle or normal to a curve: select a curve and its support, a point

on the curve, then specify the angle value, the start and end points of the line

Create lines tangent to a curve: select a curve and a reference point, then specify the start and end points of the line

Create lines normal to a surface: select a surface and a reference point, then specify the start and end points of the line

Create bisecting lines: select two lines and a starting point, then choose a solution

Creating Wireframe Geometry

Create an offset plane: select an existing plane, and enter an offset value

Create a parallel plane through a point: select an existing plane and a point The

resulting plane is parallel to the reference plane and passes through the point

Create a plane at an angle: select an existing plane and a rotation axis, then enter an angle value (90° for a plane normal to the reference plane)

Create a plane through three points: select any three points

Create a plane through two lines : select any two lines

Create a plane through a point and a line : select any point and line

Create a plane through a planar curve: select any planar curve

Create a plane normal to a curve: select any curve and a point

Create a plane tangent to a surface: select any surface and a point

Create a plane based on its equation: key in the values for the Ax + Bu + Cz = D

equation

Create a mean plane through several points: select any three, or more, points

Create n planes between two planes: select two planes, and specify the number of planes to be created

Create a circle based on a point and a radius: select a point as the circle center, a support plane or surface, and key in a radius value For circular arcs, specify the start and end angles

Create a circle from two points: select a point as the circle center, a passing point, and

a support plane or surface For circular arcs, specify the start and end angles

Create a circle from two points and a radius: select the two passing points, a support plane or surface, and key in a radius value For circular arcs, specify the arc based on the selected points

Create a circle from three points: select three points For circular arcs, specify the arc based on the selected points

Create a circle tangent to two curves, at a point: select two curves, a passing point, a support plane or surface, and click where the circle should be created For circular arcs, specify the arc based on the selected points

Create a circle tangent to two curves, with a radius: select two curves, a support

surface, key in a radius value, and click where the circle should be created For circular arcs, specify the arc based on the selected points

Create a circle tangent to three curves: select three curves

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Creating Wireframe Geometry

Create splines: select two or more points, if needed a support surface, set tangency conditions and close the spline if needed

Create a helix: select a starting and a direction, then specify the helix parameters

Create corners: select a first reference element (curve or point), select a curve, a support plane or surface, and enter a radius value

Creating connect curves: select two sets of curve and point on the curve, set their continuity type and, if needed, tension value

Create projections: select the element to be projected and its support, specify the projection direction,

Create intersections: select the two elements to be intersected

[ Up ] [ Next ]

Creating Points

Creating Points This task shows the various methods for creating points:

The Point Definition dialog box appears

Coordinates

the current axis-system

point

The corresponding point is displayed

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Creating Points

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

If you create a point using the coordinates method and an axis system is already

defined and set as current, the point's coordinates are defined according to current the axis system As a consequence, the point's coordinates are not displayed in the

specification tree

The axis system must be different

from the absolute axis

is used as reference

determine whether the new

point is to be created:

curve from the reference point

reference point and the curve's extremity

Creating Points

If a distance is specified, it can

be:

distance is measured along

You can also:

the curve

originally)

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

in a new open body

button

If the button is not checked the instances are created in the current Open Body

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Creating Points

reference point is the projection of the model's origin

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

Extremum points created on a

closed curve are now aggregated

under their parent command and

put in no show in the specification

tree

On plane

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

which the point is projected

normally to the plane

If no surface is selected, the behavior

is the same

Creating Points

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

On surface

point is to be created

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Creating Points

point By default, the surface's

middle point is taken as

reference

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

reference direction to display a

Creating Points

The Multi-Result Management dialog box is displayed because several points are generated

reference element, to which only

the closest point is created

created

Between

percentage of the distance from

the first selected point, at which

the new point is to be

button to create a point at the

exact midpoint (ratio = 0.5)

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

The point (identified as Point.xxx) is added to the specification tree

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Creating Points

Creating Multiple Points

Creating Multiple Points

This task shows how to create several points at a time

Repetition icon

The Multiple Points Creation dialog box appears

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Creating Multiple Points

created (instances field)

Here we chose 5 instances

You can choose the side on which the points are to be created in relation to the initially selected point on a curve Simply use the Reverse Direction button,

or clicking on the arrow in the geometry

points option, the last and first instances are the curve end points

instances, evenly spaced over the curve on the direction indicated

by the arrow

The points (identified as Point.xxx as for

any other type of point) are added to

the specification tree

Creating Multiple Points

you can select a second point, thus

defining the area of the curve where

points should be created

in the Multiple Points Creation dialog

box, then select the limiting point

If you selected the Point2 created

above as the limiting point, while

keeping the same values, you would

obtain the following:

If the selected point on curve already has a Reference point (as

- on curve), this reference point is automatically taken

as the second point

point is one of the endpoints of the curve

the Instances & spacing option is

In this case, points will be created in

the given direction and taking into

For example, three instances spaced

by 10mm

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