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Introduction to CATIA V5

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Introduction to CATIA V5 Powered By Docstoc
					CATIA V5
INTRODUCTION TO CATIA V5
Welcome to CATIAV5. CATIA is a one of the worlds leading high-end CAD/CAM/CAE software packages. CATIA (Computer Aided Three dimensional Interactive Application) is a multi-platform PLM/CAD/CAM/CAE commercial software suite developed by Dassault Systems and marketed world-wide by IBM.CATIA is written in the C++ programming language. CATIA provides open development architecture through the use of interfaces, which can be used to customize or develop applications. The application programming interfaces supported Visual Basic and C++ programming languages. Commonly referred to as 3D Product Lifecycle Management (PLM) software suite, CATIA supports multiple stages of product development. The stages range from conceptualization, through design (CAD) and manufacturing (CAM), until analysis (CAE). Each workbench of CATIA V5 refers an each stage of product development for different products. Catia V5 features a parametric solid/surface-based package which uses NURBS as the core surface representation and has several workbenches that provide KBE (Knowledge Based Engineering) support. Feature-based Modeling: In CATIA V5, solid models are created by integrating a number of building blocks called features. Parametric modeling: The parametric nature of a software package is defined as its ability to use the standard properties or parameters in defining the shape and size of a geometry. Associativity: Associativity ensures that if any modification is made in the model in any one of the workbenches of CATIA V5, it is automatically reflected in the other workbenches immediately. B-Rep modeling: Most of the components Designed using CATIA V5 are based on B-Rep modeling technique i.e. models are created by extruding the boundary of the model in a specified direction.

SKETCHER WORKBENCH
As CATIA V5 models are created based on B–Rep modeling technique, the Sketcher workbench enables to create boundary profile (2D geometry) of the feature.

1 Entering Sketcher Workbench: Creating a sketch: To create a sketch, Select Start -> Mechanical Design -> Sketcher from the menu bar. Select the Sketcher icon and click the preferred reference plane either in the geometry area or in the specification tree, or select a planar surface. This creates a "Simple" sketch (sketch, for which we do not specify the origin and orientation of the absolute axis,). To edit a sketch Double-click the sketch or an element of the sketch geometry. You can select it in the geometry area or in the specification tree. 3D, right-click the sketch in the specification tree, Move to [sketch name] object in the contextual menu, select Edit.

2 Creating a Positioned Sketch: In positioned sketch, one can decide the reference plane, and the origin and orientation of the absolute axis. Creating a positioned sketch enables you to define (and later change) explicitly the position of the sketch

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absolute axis. Advantage of using Position sketch over Sketch is, it can use the absolute axis directions like external references for the sketched profile geometry. Creating a positioned sketch ensures associativity with the 3D geometry. Select the Sketch with Absolute Axis Definition icon. The Sketch Positioning dialog box appears. Tool Bars: Sketcher workbench mainly consists of three tool bars. Profile Toolbar : To create geometry Operation Tool bar Constraint Toolbar : To edit the geometry : To constrain the geometry

In addition to these toolbars Sketch tools toolbar shows how tools in sketcher workbench can assist you when sketching elements.

Snap to Point If activated, the points are snapped to the intersection points of the grid.

Construction/Standard Elements: Enables to create two types of elements: Standard elements and construction elements. Where standard elements refer to the required boundary element and the construction element is a reference element to create standard element. As construction elements are not taken into account when creating features, note that they do not appear outside the Sketcher.

Geometrical Constraints: When Active, the Geometrical Constraint option command creates Geometrical Constraint when sketching elements.

Dimensional Constraints: When Active, the Dimensional Constraint option command allows forcing a dimensional constrain on one or more profile type elements, when you use the value fields in the Sketch tools toolbar for creating profile. COLORS and GRAPHICAL PROPERTIES: Grey: Construction Element with under constraint Yellow: Non-Modifiable Element (like projected elements) Orange: Selected Element White: Under-Constrained Element Brown: Not changed elements Green: Iso-Constrained Element Purple: Over constrained Element Red: Inconsistent Element Blue: Smart Pick which will assist while creating Sketcher geometrical elements. Profile Toolbar:

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Creating a Profile: This task shows how to create a profile. Profiles may be composed of lines and arcs, which you create either by clicking or using the Sketch tools toolbar. Click the Profile icon from the Profiles toolbar. The Sketch tools

toolbar appears with option commands and values. Line (active by default) Tangent Arc Three Point Arc. Press and hold the left mouse button down / Dragging the cursor allows you to activate the Tangent Arc mode automatically. If you cannot manage creating the tangent arc using the left mouse button, what you can do is select the Tangent Arc option command command in the Sketch tools toolbar. Select the Three Points Arc option

From the Sketch tools toolbar to create three-point arc.

Creating Predefined Profiles:
This sub menu Enables to create predefined geometries like Rectangle ,Oriented Rectangle

, Parallelogram ,Centered

, Elongated Hole Rectangle

,Cylindrical Elongated Hole .

Keyhole Profile

,Hexagon

,Centered parallelogram

Creating Circle: This sub menu enables to create geometries like
Circle arc , Three Point Circle , center arc . , Circle Using Coordinates , Tri-Tangent Circle , Three Pointed

Creating a Spline:
Spline can be created by selecting the points through which the spline goes. Double-click to end the spline. . Double-click on the spline to edit the parameters or control points of the spline.

Connecting Elements:
It shows you how to connect two curve type elements using either with an arc or a spline. Two connect option commands appear in the Sketch tools toolbar, Connect with Arc & Connect with Spline.

Creating conics: Creating an Ellipse:
It shows how to create an ellipse (made of two infinite axes). The Sketch tools toolbar displays values for defining the ellipse center point, major and then minor semi-axis endpoint. Position the cursor in the desired fields and key in the desired values. Creating a Parabola by Focus: Click the Parabola by Focus icon from the Profiles toolbar (Conic sub toolbar). To create a Parabola click the focus, click apex and then the two-extremity points of parabola. Creating a Hyperbola by Focus:

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Click the Hyperbola by Focus icon from the Profiles toolbar (Conic sub toolbar). To create a hyperbola, clicks the focus, center and apex, and then the hyperbola two extremity points.

Creating a Conic: This task shows how to create a conic type element by clicking desired points and, if needed, using tangents or entering the eccentricity into the Sketch tools toolbar. As a result, you will create one of the following: an ellipse, a circle, a parabola or a hyperbola. Creating a Line: Line from the Profiles toolbar enable to creates line by specifying start point and end point of the line. Doubleclick on the line to edit the parameters of the line. Creating an Infinite Line: Infinite Line from the Line sub toolbar to create an infinite line either horizontal or vertical, or still according to two points you will specify select option in sketch tools tool bar. Creating a Bi-Tangent Line: Bi-Tangent Line icon from the Line sub toolbar enables to create a tangent line to selected two elements. Tangent line is created as close as possible to where you clicked on the circle. Creating a Bisecting Line: Infinite bisecting line created by clicking two existing lines. This line passes through the intersecting point of the lines by bi-secting the angle between the selected lines. The infinite bisecting line automatically appears, in accordance with both points previously clicked. Creating an Axis: Line created by an axis icon will act as an axis for the revolving objects. A sketch consist only one axis line. Creating a Point: This task shows you how to create a point. In this task, we will use the Sketch tools toolbar but, of course one can create this point manually. Click the Point icon from the Profiles toolbar. The Sketch tools toolbar displays values for defining the point coordinates: H (horizontal) and V (vertical). Position the cursor in the desired field and key in the desired values.

Creating a Point Using Coordinates:

Create a point by indicating coordinates.

Creating Equidistant Points:

Create a set of equidistant points on a curve.

Creating a Point Using Intersection:

Create one or more points by intersecting curve type elements.

Creating a Point Using Projection: elements.

Creates one or more points by projecting points onto curve type

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Sketcher Constraints: Creating Constraints: Constraint is a relation between two geometrical elements which arrests the degrees of freedom of those elements. 1 Creating Dimensional/Geometrical Constraints: Here we will see how to set dimensional or geometrical constraints between one, two or three elements. Use the contextual menu to get other types of Constraints and desired to position this constraint as. Select the Constraint icon from the Constraint toolbar. Select a first element. Select a second element. Accordingly dimensional constrain will appear between two selected elements. For editing, double-click the constraint you wish to edit. 2 Creating a Contact Constraint: This task shows how to apply a constraint with a relative positioning that can be compared to contact. Either selects the geometry or the command first. This constraint can be created between either two elements. These constraints are in priority: concentricity, coincidence and tangency. Select the Constraint Contact icon from the Constraint toolbar (Constraint Creation sub toolbar) for giving Contact Constraint. 3 Creating Constraints via a Dialog Box: Multi-select the elements to be constrained. Click the Constraints Defined in Dialog Box icon from the Constraint toolbar. The Constraint Definition dialog box appears indicating the types of constraints can set between the selected elements (selectable options). These constraints may be constraints to be applied either one per element (Length, Fix, Horizontal, and Vertical) or constraints between two selected elements (Distance, Angle, Coincidence, Parallelism or Perpendicular). Multi-selection for Constraints is available. If constraints already exist, they are checked in the dialog box, by default. 4 Auto-Constraining a Group of Elements: The Auto Constraint command detects possible constraints between the selected elements and imposes these constraints once detected. Select the profile to be constrained. Click the Auto Constraint icon from the Constraint toolbar. The Auto Constraint dialog box is displayed. The Elements to be constrained field indicates all the elements detected by the application. The Reference Elements option allows you to select references to be used to detect possible constraints between these references and the elements selected. Once the profile is fully constrained, the application displays it in green. Click OK to constrain the sketch.

5. Animate Constraints: This Animate Constraint enables to animate a dimensional constraint between the given limits. Animate constrain dialogue box acts like a media player to animate the constraint. Operation Toolbar: 1) Creating Corners: This task shows how to create a rounded corner (arc tangent to two curves) between two selected objects. The possible corners options are displayed in the Sketch tools toolbar: Select the two lines. The second

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line is also highlighted, and the two lines are joined by the rounded corner which moves as you move the cursor. This lets you vary the dimensions of the corner. Enter the corner radius value in the Sketch tools toolbar. You can also click when you are satisfied with the corner dimensions. 2) Creating Chamfers: This task shows how to create a chamfer between two lines trimming either all, the first or none of the elements, and more precisely using one of the following chamfer definitions: Angle/Hypotenuse, Length1/Length2, and Length1/Angle. Click the Chamfer icon from the Operation toolbar. The possible chamfer options are displayed in the Sketch tools toolbar. Trim All / First / No element. Select the two lines. Click when you are satisfied with the dimensions of the chamfer. 3) Trimming Elements: Trimming two elements: This task shows how to trim two lines (either one element or all the elements). Create two intersecting lines. Click the Trim icon from the Operations toolbar. The Trim toolbar options display in the Sketch tools. The Trim All option is the command activated by default. Select the first line. Position the cursor on the element to be trimmed. The location of the Relimitation depends on the location of the cursor. Trimming one element: This task shows how to trim just one element. Click the Trim icon from the Operations toolbar. Click the Trim One Element option trimmed by second curve. 4) Breaking and Trimming: This task shows how to quickly delete elements intersected by other Sketcher elements using breaking and trimming operations. Click the Quick Trim icon from the Operation toolbar (Relimitations sub toolbar). The possible trim option commands are displayed in the Sketch tools toolbar. These options are Rubber In, Rubber out, and Break. 5) Closing Elements: This task shows how to close circles, ellipses or splines using Relimitation operation. Click the Close icon from the Operation toolbar (Relimitations sub toolbar). Select one or more elements to be relimited. For example, a three point arc. The arc will now be closed. 6) Complement an Arc (Circle or Ellipse): This task shows how to complement an arc (circle or an ellipse). Create a three point arc. Click on the arc to be complemented to select it. Click the Complement icon from the Operation toolbar (Relimitations sub toolbar). The complementary arc appears for selected arc. 7) Breaking Elements: The Break command lets you break any types of curves. The elements used for breaking curves can be any Sketcher element. Click the Break icon from the Operations toolbar. Select the line to be broken. Select the breaking element. The selected element is broken at the selection. The line is now composed of two movable segments. . Select the two curves. First curve will only be

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8) Creating Symmetrical Elements: This task shows how to repeat existing Sketcher elements using a line, a construction line or an axis. Select the profile to be duplicated by symmetry. Click the Symmetry icon from the Operations toolbar. The selected profile is duplicated and a symmetry constraint is created on the condition you previously activated the Dimensional Constraint option from the Sketch tools toolbar.

9) Translating Elements: This task will show how to perform a translation on 2D elements by defining the duplicate mode and then selecting the element to be duplicated. Multi-selection is not available. Click the Translation icon from the Operation toolbar (Transformation sub toolbar). The Translation Definition dialog box displays and will remain displayed all along your translation creation. Enter the number of copies you need. The duplicate mode is activated by default. Select the element(s) to be translated. Click the translation vector start point or select an existing one. In the Translation Definition dialog box, enter a precise value for the translation length. Click OK in the Translation Definition dialog box to end the translation. 10) Rotating Elements: This task will show how to rotate elements by defining the duplicate mode and then selecting the element to be duplicated. Click the Rotation icon from the Operations toolbar (Transformation sub toolbar). The Rotation Definition dialog box appears and will remain displayed all along the rotation. De-activate the Duplicate mode, if needed. Select the geometry to be rotated. Here, multi-select the entire profile. Select or click the rotation center point. Select or click a point to define the reference line that will be used for computing the angle. Select or click a point to define an angle. Click OK in the Rotation Definition dialog box to end the rotation. 11) Scaling Elements: This task will show how to scale an entire profile. In other words, you are going to resize a profile to the dimension you specify. Click the Scale icon from the Operation toolbar (Transformation sub toolbar). The Scale Definition dialog box appears. Select the element(s) to be scaled. Enter the center point value in the Sketch tools toolbar or click the center point on the geometry. Enter Scale Value in the displayed Scale Definition dialog box. Selected elements will be scaled according to scale factor. 12) Offsetting Elements: This task shows how to duplicate an element of the following type: line, arc or circle. Click the Offset icon from the Operations toolbar (Transformation sub toolbar). There are two possibilities, depending on whether the line you want to duplicate by offset is already selected or not: If the line is already selected, the line to be created appears immediately. If the line is not already selected, select it. The line to be created appears. Select a point or click where you want the new element to be located. The selected line is duplicated. Both lines are parallel. You can also apply one or more offset instances to profiles made of several elements. You can offset elements by using tangency propagation or point propagation, by creating an offset element that is tangent to the first one, by creating several offset instances. 13) Projecting 3D Elements onto the Sketch Plane: This task shows how to project edges (elements you select in the Part Design workbench) onto the sketch plane. Click the Project 3D Elements icon from the Operations toolbar (3D Geometry sub toolbar). Multi-select the edges

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you wish to project onto the sketch plane. The edges are projected onto the sketch plane. These projections are yellow. 14) Intersecting 3D Elements with the Sketch Plane: This task shows how to intersect a face and the sketch plane. Select the face of interest. Click the Intersect 3D Elements icon from the Operations toolbar (3D Geometry sub toolbar). The software computes and displays the intersection between the face and the sketch plane. 15) Creating Silhouette Edges: This task shows how to create silhouette edges to be used in sketches as geometry or reference elements. Click the 3D Silhouette Edges icon from the Operation toolbar (3D Geometry sub toolbar). Select the surface. The silhouette edges are created onto the sketch plane. These silhouette edges are yellow if they are associative with the 3D. You cannot move or modify them but you can delete one of them which mean deleting one trace independently from the other. Cutting the Part by the Sketch Plane: This task shows how to make some edges visible. In other words, you are going to simplify the sketch plane view by hiding the portion of material you do not need for sketching. Select the plane on which you need to sketch a new profile and enter the Sketcher workbench. Click the Cut Part by Sketch Plane icon on the Tools toolbar to hide the portion of part you do not want to see in the Sketcher. You can now sketch the required profile.

PART DESIGN
The Part Design application makes it possible to design precise 3D mechanical parts with an intuitive and flexible user interface, from sketching in an assembly context to iterative detailed design. Part Design application will enables to accommodate design requirements for parts of various complexities, from simple to advance. This application, which combines the power of feature-based, parametric design with the flexibility of a Boolean approach, offers a highly productive. Opening a New Part Document: This task shows you how to open a new part (CAT Part) document. Select the File -> New commands (or click the new icon). The New dialog box is displayed, allowing you to choose the type of document you need. Select Part in the List of Types field and click OK. The Part Design workbench is loaded and a CAT Part document opens. The Part Design workbench document is divided into: a) the specification tree, b) the geometry area, c) specific toolbars, and a number of contextual commands available in the specification tree and in the geometry. Remember that these commands can also be accessed from the menu bar. CATIA provides three references Planes to start design. Actually, designing a part from scratch will first require designing a sketch. Sketching profiles is performed in the Sketcher workbench, which is fully integrated into Part Design. To open it, just click the Sketcher icon and select the work plane of your choice. The Sketcher workbench then provides a large number of tools allowing you to sketch the profiles you need.

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Part design workbench mainly consists of 4 toolbars: 1. Sketch based features 2. Dress up features 3. Transformation features 4. Surface based features Besides theses toolbars Reference elements toolbars helps to create reference elements and Insert toolbar helps to create different bodies or geometrical sets. Reference Elements: An element which helps to create a feature in geometrical area is called a reference element like points, wire frame elements, planes and surface elements. a) Creating Point: In CATIA points can be created in the following types: Coordinates: Creating point with X, Y, Z coordinates in the current axis-system on curve: Creating point on curve. On plane: Creating point on plane On surface: Creating point on a surface. Circle center: Creating point of a circle, ellipse. Tangent on curve: Creating point tangent to curve. Between: Creating point between two other points.

b) Creating Lines: In CATIA a line can be created in the following types Point – Point: Create line between the two points. Point – Direction: Create line from a point along a direction. Angle or normal to curve: Create line at an angle to curve. Tangent to curve: Create line tangent to curve. Normal to surface: Create line normal to surface. Bisecting: Create line for bisector of two lines. 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.

c) Creating Planes: In CATIA plane can be created in the following types: Offset from plane: Create a plane at a distance from reference plane. Parallel through point: Create a plane passing through a point & parallel to reference plane. Angle or normal to plane: Create a plane

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at an angle to reference plane. Through three points, through two lines through point and line, through planar curve, Tangent to surface, Normal to curve, Mean through points Equation. 1. SKECTH-BASED FEATURES: Sketch based features are features which are created from the sketched profile. Depending upon the extruding direction of the profile, various types of sketch based features are available as follows.

1.1 PAD

and Pocket

:

Creating a pad means extruding a profile in specified direction by adding material and pocket means extruding a profile in specified direction by removing material. This definition dialogue box enables to provide length and direction(by default it is normal to the sketched plane) of extrusion, type of extrusion (like Up to Next ,Up to Last, Up to Plane, Up to Surface) in both limits i.e. Extruding direction and opposite to the extruding direction. Reverse direction option enables to swap the first Limit and second Limit. Click the Mirrored extent option to equate the first Limit and second Limit extruding length.

1.2 Multi-Pad

and Multi Pocket

:

It can extrude multiple profiles belonging to a same sketch using different length values. The multi-pad capability enables to do this at one time. Select Sketch that contains the profiles to be extruded. Note that all profiles must be closed and must not intersect. The Multi-Pad Definition dialog box appears and the profiles are highlighted in green. For each of them, you can drag associated manipulators to define the extrusion value.

1.3 Shaft

Groove

:

Shaft is revolved feature which adds the material in angular direction and groove removes the material in angular direction about an axis. For the purposes of our scenario, the profile and the axis belong to the same sketch or one select the axis from the contextual menu at axis selection field. Shaft or groove can create from sketches including several closed profiles. These profiles must not intersect and they must be on the same side of the axis. The definition dialog box enables to provide the limits LIM1 that corresponds to the first angle value, and LIM2 that corresponds to the second angle value. Reverse direction option enables to swap the first Limit and second Limit Alternatively, select LIM1 or LIM2 manipulator and drag them onto the value of your choice.

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1.4 Hole: Hole dialog box enables to place a hole in a body. This dialog box consists of three sub-options extension, type and thread definition. The extension sub-option enables to define the diameter of the hole, depth of the hole, direction of the hole, position of the hole and bottom shape of the hole. Type sun-option enables to define the various shapes of standard holes like follows:

Simple

Tapered

Counter Bored

Countersunk

Counter Drilled

Thread definition sub-option enables to create a thread o the hole. Thread can be defined by giving values or directly by standard values. We can define a thread in Three different ways like No Standard: uses values entered by the user, Metric Thin Pitch: uses AFNOR standard values, Metric Thick Pitch: uses AFNOR standard values. There is no geometrical representation is the geometry area, but the thread (identified as Thread.xxx) is added to the specification tree.

1.5 Rib

and Slot

:

Extruding a profile along a center curve by adding material is rib and by removing material is slot. Profile can be controlled in three ways. Keep Angle: keeps the angle value between the sketch plane used for the profile and the tangent of the center curve. Pulling Direction: sweeps the profile with respect to a specified direction. To define this direction, you can select a plane or an edge. Reference Surface: the angle value between axis and the reference surface is constant.nce element or a pulling direction. It should be kept in mind that 3D curve if selected as center curves must be continuous in tangency & if the center curve is planar, it can be discontinuous in tangency. 1.6 Thin Solids: Thin solids or thin solid cuts are formed by adding or removing material to the profile used in the features like pad, pocket, shaft, groove, rib and slot. Thickness can be provided on the both sides of the profile by entering the values in thickness1 and thickness2 fields. To add material equally to both sides of the profile, check "Neutral fiber" check box. Checking the "Merge Ends" option extends the thin solid or solid cut of the profile up to the available support i.e. material. Merge rib ends option extends the thin solid or solid cut of the center curve in rib features.

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1.7 Multi-sections solid (Loft) and Removed Multi-sections solid :

Loft is a feature by sweeping one or more planar section curves along a computed or user-defined spine. Loft definition dialog box consists of fields like sections, guides, spine, coupling, relimitation and smoothing parameters. Section field enables to define the sections required for computing the loft. Guide curve is a curve which shows the material flow from first section to last section. Guide curve should pass through the section profile. These guide curves will act as an edge for the lofted solid. Spine is a curve which controls the shape of the body. Coupling is the joining of the section in the lofted solid. Four types coupling modes are available in CATIA V5 are Ratio, Tangency, Tangency then curvature and vertices. Coupling points will act as a straight line guide curves. We can control the depth of the solid on the spine by relimitation check box. Angular correction smoothes the lofting motion along the reference spine or guide curve and deviation smoothes the lofting motion by deviating from the guide curves.

1.8 Stiffener

:

Stiffener is a strengthening feature. This task shows you how to create a stiffener by specifying creation directions and thickness of the stiffener. Two creation modes are available: From side: the extrusion is performed in the profile's plane and the thickness is added normal to the plane. Check the Neutral Fiber option. This option adds material equally to both sides of the profile. From Top: the extrusion is performed normal to the profile's plane and the thickness is added in the profile's plane. The "Neutral Fiber" option adds the same thickness to both sides of the profile. You just need to specify the value of your choice in "Thickness 1" field and this thickness is evenly added to each side of the profile. Conversely, if you wish to add different thickness on both sides of the profile, just uncheck the "Neutral Fiber" option and then specify the value of your choice in "Thickness 2" field. 1.9 Solid Combine: Solid combine remains the common portion by extruding two selected profiles in a specified direction. 2 DRESS UP FEATURES: Fillets: A fillet is a curved face of a constant or variable radius that is tangent to, and that joins, two surfaces. Four types of fillets available in CATIA V5 as follows

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2.1 Edge Fillet: Edge fillets are smooth transitional surfaces between two adjacent faces with constant radius on the entire selected Propagation enables edge. mode easy

selection of edges. Two propagation

modes are available: Minimal, If you Tangency. set the

Tangency mode, the option "Trim ribbons" becomes available. Trim ribbons trim the fillets when they are intersected. Use Limiting Elements to limit the fillet. When filleting an edge, the fillet may sometimes affect other edges of the part, depending on the radius value you specified. With the Edges to keep option the application detects these edges and stops the fillet to these edges. Blend corner controls the shape of the fillers at corner. 2.2 Variable Radius fillets: Edge fillets are smooth transitional surfaces between two adjacent faces with variable radius at the selected points on the selected edge. Two variation modes are available to join the end points of the fillets at variable radii are Linear and cubic. 2.3 Face-Face Fillet: Generally use of Face-face fillet command when there is no intersection between the faces or when there are more than two sharp edges between the faces. Instead of entering a radius value, we can use a "hold curve" to compute the fillet. Depending on the curve's shape, the fillet's radius value is then more or less variable. 2.4 Tritangent Fillet: Tri-tangent filets forms tangential surface to the selected three faces. 2.5 Chamfer: Chamfering consists in removing or adding a flat section from a selected edge to create a beveled surface between the two original faces common to that edge. The parameters to be defined the chamfer are Lengh1 and Length2 or length1 and angle.

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2.6 Draft Angle :

Drafts are defined on molded parts to make them easier to remove from molds. The characteristic elements are: Pulling direction: this direction corresponds to the reference from which the draft faces are defined. Draft angle: this is the angle that the draft faces make with the pulling direction. Parting element: this plane, face or surface cuts the part in two and each portion is drafted according to its previously defined direction. Neutral element: this element defines a neutral curve on which the drafted face will lie. This element will remain the same during the draft. The Propagation option can be set to: none: there is any propagation, Smooth: the application integrates the faces propagated in tangency onto the neutral face to define the neutral element. Parting = Neutral to reuse the plane you selected as the neutral element. If Keep Parting =Neutral, you then can also check the option Draft both sides.

2.7 Variable Angle Draft

:

Variable Angle Draft allows to define variable angles at different points on the line formed from the intersection of selected face and neutral plane. Two forms of drafting modes are available as draft from square and draft from cone.

2.8 Draft from Reflect Lines

:

Draft from reflect Lines creates a tangential face to the cylindrical surfaces by defining the required angle and parting element.

2.9 Shell

: Shell is a feature which converts solid into a thin solid by defining the thicknesses of the faces. It allows defining the inside and outside thicknesses for the selected faces. Selected faces can be removed.

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2.10 Thickness :

It can thicken selected face by defining thickness value. It allows thickening other selected faces by defining the other thickness value.

2.11 Thread/Tap

:

The Thread/Tap capability creates threads or taps, depending on the cylindrical entity of interest. It allows to define lateral face on which we are going to create thread, limit face to limit the depth of the thread. Thread can be defined by giving values or directly by standard values. We can define a thread in Three different ways like No Standard: uses values entered by the user, Metric Thin Pitch: uses AFNOR standard values, Metric Thick Pitch: uses AFNOR standard values. There is no geometrical representation is the geometry area, but the thread (identified as Thread.xxx) is added to the specification tree. 2.12 Remove Face :

Remove face simplifies a part by removing some of its unnecessary faces.

2.13 Replace face

:

Replace face replaces the selected face with required face. 3. TRANSFORMATION FEATURES: Following are different transformation features available. 3.1 Translation : Translation moves the current body to the required position in linear direction. We can translate current body in three ways: By defining Direction and distance, Point to point and co-ordinates.

3.2 Rotation

:

Rotate moves the current body to the required position in angular direction about an axis. We can rotate current body in three ways: By defining axis-angle, axis-two elements and tree points. 3.3 Symmetry :

Symmetry makes move the current body symmetrical to the reference element. The reference element may be point or line or plane. 3.4 Mirror :

Mirroring a body or a list of features consists in duplicating these elements using symmetry. The mirroring element must be a plane. Pattern: You may need to duplicate the whole geometry of one or more features and to position this geometry on a part. Patterns let you do so. CATIA allows to define three types of patterns: rectangular, circular and user patterns. These features accelerate the creation process.

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3.5 Rectangular Pattern :

Rectangular Pattern duplicates the selected features or current body in the specified linear directions by defining any two parameters among instances, spacing and length. We can edit the spacing between objects in Instances and unequal spacing option. We can control the position and orientation of the pattern by defining position and angle in the “position of the object in pattern” field. By checking the keep specification option, the specification of the parent object will apply to the duplicated objects. By checking the simplified representation option, represents the pattern in a simplified way if the pattern is large. 3.6 Circular Pattern :

Circular Pattern duplicates the selected features or current body in the specified angular (axial reference) and radial (crown definition) direction. Pattern in axial direction cab be defined by any two parameter among instances, angular spacing and total angle (complete crown means total angle is 3600). . We can edit the angle between objects in Instances and unequal angular spacing option. Pattern in radial direction cab be defined by any two parameters among Circles, circular spacing and crown thickness. We can control the position and orientation of the pattern by defining position and angle in the “position of the object in pattern” field. By checking the keep specification option, the specification of the parent object will apply to the duplicated objects. By checking the simplified representation option, represents the pattern in a simplified way if the pattern is large. By checking the radial alignment of instances we can control the orientation of the object with respect to the axis of the pattern.

3.7 User Defined Pattern

:

The User defined Pattern duplicates the features of the current body in sequence defined by the reference points in the sketch. Locating instances consists in specifying anchor points.

3.8 Scaling

:

Scaling means to resize a body to the dimension specified. Select the body to be scaled. Select the reference element located on the body. Enter a value in the Ratio field or select the manipulator and drag it. The ratio increases as you drag the manipulator in the direction pointed by the right end arrow. 4. SURFACE-BASED FEATURES: Surface-based features are created by converting surfaces into solids. 4.1 Split :

Split divides the current body into parts and kept the required portion of the body by defining the direction of the arrow. 4.2 Thick Surface It can thicken the selected surface by defining thickness values on both sides.

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4.3 Close Surface :

It converts the closed surface into a solid body by filling the material. 4.4 Sew Surface :

Sewing operation combines a surface with a body. This capability adds or removes material by modifying the surface of the solid. 5. BODY: In CATIA V5, set of features is called as a Body and set of reference elements are called geometrical set. We can insert body or geometrical set in the specification tree by using Insert Toolbar. The body may be a +ve body or –ve body depending upon the first feature of the body. The default body in the specification tree is called part body and it is a +vet body. Operations performed between these bodies are called Boolean operations. 5.1 Assembling Bodies :

The assemble operation union the two selected bodies by considering the polarities of the bodies. 5.2 Adding Bodies :

The add operation union the two selected bodies without considering the polarities of the bodies.

5.3 Removing Bodies

:

The remove operation removes selected body from another body. 5.4 Intersecting Bodies :

The Intersecting Bodies retain the common portion of the two intersecting bodies. 5.5 Trimming Bodies :

The Trimming Bodies trims the body with reference to another body and unions the remaining bodies. 5.6 Remove Lump :

It removes the lumps inside a body.

Surface Modeling
Wireframe and surface design workbench enables to create wireframe and surface elements, to enrich the solid modeling capability by using the advantages of wireframe and surface. Wireframe elements will be converted into surfaces and these surfaces will be converted into solids. This workbench mainly consists of toolbars like Wireframe: To create wireframe entities Surfaces: To create surface entities Operations: To performs operations between elements.

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1. Wireframe: 1.1. Points: In CATIA points can be created in the following types: Coordinates: Creating point with X, Y, Z coordinates in the current axis-system on curve: Creating point on curve. On plane: Creating point on plane On surface: Creating point on a surface. Circle center: Creating point of a circle, ellipse. Tangent on curve: Creating point tangent to curve. Between: Creating point between two other points.

1.2 Points Creation Repetition

: This task shows how to create multiple points along a curve at a time. It allows creating planes normal to the curve through the created points. By checking the with end points option, the last and first instances are the curve end points.j

1.3 Line: In CATIA a line can be created in the following types Point – Point: Create line between the two points. Point – Direction: Create line from a point along a direction. Angle or normal to curve: Create line at an angle to curve. Tangent to curve: Create line tangent to curve. Normal to surface: Create line normal to surface. Bisecting: Create line for bisector of two lines. 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.

1.4 Axis: Axis can be used as a reference element which passes through the center of the selected object in the specified direction. That object must be circle, arc, ellipse, oblong, revolution surface or sphere.

1.5 Polylines: Polyline is a first degree spline that passes through a selected set of points (line is a first degree curve). This task shows how to create a Polyline that is a broken line made of several connected segments. We can fillet the corners of the Polyline by defining the fillet radius. 1.6 Plane: In CATIA plane can be created in the following types: Offset from plane: Create a plane at a distance from reference plane. Parallel through point: Create a plane passing through a point & parallel to reference plane. Angle or normal to plane: Create a plane at an angle to

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reference plane. Through three points, through two lines through point and line, through planar curve, Tangent to surface, Normal to curve, Mean through points Equation.

1.7Creating Projections

:

This task shows how to create wireframe entities by projecting one or more elements onto a support. The projection may be normal or along a direction. By checking the nearest solution it will take the nearest projected element as result when the projected element crosses the selected surface.

1.8 Creating Intersections : This task shows how to create geometry by intersecting elements. Result of Intersection may be a

point or curve and contour or surface depending on the input geometry. We can also create the intersection from non-intersecting linear elements by checking the “extend linear supports for intersection”. By checking the extrapolate intersection on first element, the resultant will extends on the first element. The lines which are lying on parallel planes are also intersected by checking the option intersects non-coplanar line segments, but it is applicable to only linear elements. 1.9 Circles :

This task shows the various methods for creating circles and circular arcs. Use the combo to choose the desired circle type: Center and radius, Center and point, two points and radius, three points, Bitangent and radius, Bitangent and point, Tritangent. By checking Geometry on Support, the circle will created on the selected surface. By Checking Axis computation, it will display the axis of the circle. We can define the limitations of the arc in Circle limitations field. .10 Creating Corners : This task shows how to create a corner between two curves or between a point and a curve. The corner will be created between two reference elements. Select the Support surface. The resulting corner is a curve seen as an arc of circle lying on a support place or surface. The reference elements must lie on this support, as well as the center of the circle defining the corner. Enter a Radius value. Several solutions may be possible, the Next Solution button moves to another corner solution, or directly select the corner in the geometry. By checking the trim elements check box, we can trim and assemble the two reference elements to the corner.

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1.11 Creating Connect Curves : This task shows how to create connecting curves between two existing curves. Select a first Point on a curve then a second Point on a second curve. Use the combos to specify the desired Continuity type: Point, Tangency or Curvature. By checking the Trim elements check box, we can trim and assemble the two initial curves to the connect curve. 1.12 Creating Splines : Spline is a curve which is formed by connecting number of curves by using continuity techniques. Shape of the spline can be controlled by two modes: Explicit where we can define the spline parameters like Tangent direction, Tangent tension, and curvature Direction and curvature radius and from curve. Geometry on Support can creates the spline on the selected surface. 1.13 Creating a Helix : This task shows the various methods for creating helical 3D curves. Location and radius of the helix can be defined by selecting Starting point and axis of the helix. Size and shape of the helix can be controlled by parameters Pitch, Height, Orientation, Starting Angle, Taper Angle, Profile and Law. 2. Surfaces: Surface allows modeling both simple and complex surfaces using techniques such as extruding, lofting and sweeping etc. Two creation modes are available: either you create geometry with its history or not. Geometry with no history is called a datum. For creating datum feature use create datum icon in tool menu icon. 2.1 Creating Extruded Surfaces :

This task shows how to create a surface by extruding a profile along a given direction. It provides to define the start and end limits of the extrusion. Reverse Direction button to display the extrusion on the other side of the selected profile.

2.2

Creating

Revolution

Surfaces : This task shows how to create a surface by revolving a planar profile about revolution axis by giving angular limits. There must be no intersection between the axis and the profile. If the profile is a sketch containing an axis, the latter is selected by default as the revolution axis. You can select another revolution axis simply by selecting a new line. 2.3 Creating Spherical Surfaces :

This task shows how to create surfaces in the shape of a sphere. The spherical surface is based on a center point, an axis-system defining the meridian & parallel curves orientation, and angular limits.

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2.4 Creating Offset Surfaces: This task shows how to create a surface by offsetting an existing surface along the normal direction. We can define the offset by entering a value or using the graphic manipulator. We can control the smoothing of surfaces by automatic and manual. Sub –Elements to remove command removes the surfaces from the global surface which we are not required. 2.5 Creating Swept Surfaces: Creating a surface by extruding the given profile along a curve is called sweep. Profile may be explicitly defined, line, circle or a conic. a) Using an Explicit Profile A profile can be swept along a given guide curve in three ways; with two guide curves with reference surface and with pulling direction. Given profile will sweep along the give guide curves by taking normal to the given spine. Anchoring points are the intersections points f the guide and the profiles. We can control the depth of the surface on the spine be specifying relimitation. By using with reference surface option swept surface will flow the given guide curve and give reference surface. We can control the angle of the profile with reference to the guide curve by using angle option. The orientation of the profile with respect the guide curve can be controlled by defining the pulling direction in the “with pulling direction” option. b) Using a Linear Profile A line can be swept along a given guide curve in seven possible cases as Two limits, Limit and middle, with reference surface, with reference curve, with tangency surface, with draft direction and with two tangency surfaces. IN “with Draft Direction option” we can draft the swept surface by a specified angle. We can define the angle in wholly defined tab. We can define the angle for the every sub element in the selected profile in G1Constants tab. We can define the angle at the selected points on the profile by using Location Values Tab. c) Using a Circular Profile A circle can be swept along a given guide curve in 6 possible cases as three guides, two guides and radius, center and radius, two guides and tangency surface and one guide and tangency surface. d) Using a Conical Profile A conic can be swept along a given guide curve in 4 possible cases as two guide curves, three guide curves, four guide curves and five guide curves. 2.6 Fill Surfaces : This task shows how to create fill surfaces between closed boundaries. Select curves or surface edges to form a closed boundary. Filling surface also fills the boundary through the selected passing point. Filling surface maintain continuity with respect to related support of the particular segment of the boundary. 2.7 Creating Lofted Surfaces : This task shows how to create a lofted surface by sweeping planar section curves along a computed or user-defined spine. Loft definition dialog box consists of fields like sections, guides, spine, coupling, relimitation, canonical element and smoothing parameters. Section field enables to define the sections required for computing the loft. Guide curve is a curve which shows the material flow from first section to last section. Guide curve should pass through the section profile. These guide curves will act as an edge for the loft. Spine is a curve which controls the shape of the body. Coupling is the joining of the section in the lofted surface. Four types coupling modes are available in CATIA V5 are Ratio, Tangency, Tangency then curvature and vertices. Coupling points will act as a straight line guide curves. We can control the depth of the solid on the spine by relimitation check box. Canonical element detects the planar surfaces in the multi sectioned surfaces. Angular correction smoothes the lofting motion along the reference spine or guide curve and deviation smoothes the lofting motion by deviating from

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the guide curves. 2.8 Creating Blended Surfaces : This task shows how to create a blended surface that is a surface between two wireframe sections. Blended surface maintain continuities with the selected supports. Tension of the blend is defined in 3 ways: constant, linear and Stype. Spine is a curve which controls the shape of the surface. Coupling is the joining of the section in the blended surface. Four types coupling modes are available in CATIA V5 are Ratio, Tangency, Tangency then curvature and vertices. Coupling points will act as a straight line guide curves.

3. Operations Toolbar: Wireframe and Surface allows modifying the design using techniques such as trimming, translating and rotating.

3.1 Joining Surfaces or Curves : This task shows how to join adjacent surfaces or adjacent curves. Joined curves or surfaces will act as a single entity. By checking the “Check tangency”, “Check connexity” and “Check manifold”, we can find out whether the resulting surface maintains the tangency, connectivity and manifold. Simplify the result check button simplify the joined surface if there any small edges formed due to the joining. Ignore erroneous elements ignores the elements which are creating error to form the joining. Resulting surface or wireframe automatically connects the element if the distance between elements are below the merging distance. By using Angular Threshold we can connect the surface at an angle above the angle threshold value only. We can subgroup the elements in the resulting surface by using federation tab. We can remove the sub elements in the resulting surface by using Sub-elements to remove tab.

3.2 Healing Geometry : This task shows how to heal surfaces, that is how to fill any gap that may be appearing between two surfaces. Select the surfaces to be healed. From the Parameters tab, define the distance below which elements are to be healed. We can also set the Distance objective. Provided the Tangent mode is active, we can retain sharp edges, by clicking the Sharpness tab, and selecting one or more edges. The Sharpness angle allows redefining the limit between a sharp angle and a flat angle. 3.3 Splitting Geometry: This task shows how to split a surface or wireframe element by means of a cutting element. We can change the portion to be kept by using other side option. The Elements to remove and Elements to keep options allow defining the portions to be removed or kept when performing the split operation. 3.4 Untrim:

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This task shows how to restore the limits of a surface when it has been split using the Break Surface or Curve icon. 3.5 Disassembling Elements: This task shows how to disassemble multi-cell bodies into mono-cell bodies. Selected elements are disassembled in 2 modes: All Cells: all cells are disassembled, Domains Only: elements are partially disassembled. The resultant elements are non-parametric curves. 3.6 Trimming Geometry: This task shows how to trim surfaces or wireframe elements. Trim command trims the selected elements at the intersection portions in standard mode. In pieces mode it will keep the selected portion of the wireframe element by trimming with another wireframe element.

3.7 Boundary Curves: This task shows how to create boundary curves. The boundary curve is displayed according to the selected propagation type like complete boundary, point continuity, tangent continuity and no propagation. We can relimit the boundary curves by means of two points on the boundary. 3.8 Extracting Geometry: This task shows how to perform an extract from elements (curves, points, solids, and so forth.). If extract a face of a solid then the extracted element is a surface element. Boundary of a surface is a wireframe element. Choose the Propagation type: Point continuity, No propagation, or Tangent continuity. 3.9 Translate: Translation moves the surface element to the required position in linear direction. We can translate in three ways: By defining Direction and distance, Point to point and co-ordinates. Use Hide/Show initial element button to hide or show the original element for the translation. 3.10 Rotate : Rotate moves the geometry to the required position in angular direction about an axis. We can rotate current element in three ways: By defining axis-angle, axis-two elements and three points. 3.11 Symmetry: This task shows how to transform geometry with respect to the reference element by means of a symmetry operation. Select a point, line or plane as reference element. 3.12 Scaling : This task shows how to resize geometry by means of a scaling operation. It is defined by giving reference element and ratio to resize the given geometry. 3.13 Affinity: This task shows how to transform geometry by means of an affinity operation. Select the element to be transformed by affinity. Specify the characteristics of the axis system to be used for the affinity operation. Specify the affinity ratios by entering the desired X, Y, Z values. 3.14. Axis to axis system: This task shows how to orient the geometry from one axis system to another axis system. 3.14 Extrapolating Surfaces: Extrapolating a surface means extending a boundary of a surface with reference to the surface or extending an endpoint of a wireframe with reference to the wireframe element up to a defined distance or an element. Resulting element can maintain selected continuity with the reference element. The edge of the resulting element is either normal the boundary or tangent to the edge of the reference. DRAFTING

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Drafting workbench enable to create a engineering drawing i.e. a type of drawing that is technical in nature, used to fully and clearly define requirements for engineered items, and is usually created in accordance with standardized conventions for layout, nomenclature, interpretation, appearance (such as typefaces and line styles), size, etc. Its purpose is to accurately and unambiguously capture all the geometric features of a product or a component. The end goal of an engineering drawing is to convey all the required information that will allow a manufacturer to produce that component. There are four main steps to create drawing:     Starting a new drawing Applying title block Creating Views Creating Dimensions and annotations

Starting a new drawing: While entering into the drafting workbench it will shows the properties of the drawing sheet and a layout of the views placement in a new drawing creation dialog box. We can modify the properties of the sheet by Modify option. We can change the standard, size of the sheet, orientation of the sheet, scale of the sheet through the new drawing dialog box.

Applying the title block: To create a title block for the drawing we have to select the sheet background mode from the edit pull down menu. In sheet background mode we can create the title block by using sketch tools or we can insert a exiting title block in the system from the new from option in the file pull down menu or We can insert a sample existing title block from insert->drawing->frame and title block option in sheet background mode and we can modify

this sheet by using sketch tools. After creating title block we can come back to the working views from the edit-> working views options. Creating views: Views can be created in two ways:   UnAssociative (i.e., not linked to 3D models), which are called Draw Views. Associative (i.e., linked to 3D models), which are Generated views.

UnAssociative views are placed in the drawing sheet by using sketching tools like points, lines, circles, ellipse, curves, profiles workbench. Associative views are placed with reference to a part model and these views are linked with that model. Required views are placed from the view too bar. To start an Associative drawing first step is to place a front view from the 3D model. , relimitation, transformations and constraints available in the drawing

Creating front view:

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Because the location for all required views is based on the front view, selection of the front view is crucial in proper drawing planning. The front view should be based on the following six guide lines. The front view should       Represent the most natural position of use. Best describe the overall contour of the component. Show the longest side. Have the fewest hidden features. Be in the most stable position. Provide the best clarity in locating information.

To place the associative front view we have to select the front view orientation from the 3D model through the window pull down menu. We can control the orientation of the view by using compass in the drafting workbench.

Unfolded View: Unfolded view creates the developed sheet drawing for the sheet metal parts.

View from 3D: It will generate the front view from the annotations placed in the 3D model. Projection View: This task show how to create projection views on the sheet, relatively to the front view previously generated. Auxiliary View: Many objects are of such shape that their principal faces cannot always be assumed parallel to the regular planes of projection. Creating an auxiliary view allows showing the true shapes by assuming a direction of sight perpendicular to planes that are perpendicular of the curves. This auxiliary view, together with the top view, completely describes the object.

Isometric View: This task shows how to create an isometric view from a 3D part.

Advanced Front View: We can configure such elements as the view name, view scale, etc. at the time of placing the front view itself.

Offset Section View

/ Cut:

This task shows how to create section view for an object. Offset section view gives the view of the remining part after sectioning. Offset section cut gives view of the portion of the section plane which intersecting the part.

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Aligned Section View / Cut:

In alined section view the part can be cut by a profile and the view gives the developed length of the profile with the remining part and in alined section cut the view is the intersection portion of the section profile with the part. Detail View / Detail View Profile :

A detail view is a partial generated view that shows only what is necessary in the clear description of the object. It shows how to create from the 3D a detail view using either a circle as callout or a sketched profile. Detail view gives the intersection portion of the circle with the view and quick detail view gives the portion of the view in the circle or sketched profile. Clipping View and/or a Clipping View Profile :

A clipping view is a partial view that shows only what is necessary in the clear description of the object. This operation is applied directly onto the active view. Here we will see how to create both a clipping view using a circle as callout and sketched profile as callout. ] Broken View: A broken view is Breakout View : a view that allows shortening an elongated object.

Here we will remove locally material from a generated view in order to visualize the remaining visible internal part. A breakout view is one not in direct projection from the view containing the cutting profile. A breakout view is often a partial section. Wizard :

By using wizard command we can place the required views at once in the drawing sheet. We can select the layout of views required from the wizard dialog box. We can place the views by selecting a front viewing plane from 3D object. Managing a Sheet: A sheet contains: a main view: a view which supports the geometry directly created in the sheet, a background view: a view dedicated to frames and title blocks, interactive or generated views. Adding a new sheet: We can add new sheets at any time. These new sheets will be assigned the same standard, format and orientation as the sheet first created and defined using the New Drawing dialog (default setting). Adding a new Detail sheet: This task shows how to create a detail sheet and then position a 2D component on this sheet. This 2D component will then be instantiated on a design drawing sheet.

Instantiate 2D component: This task shows how to re-use a 2D component. In this particular case, we will instantiate a 2D component previously created on a detail sheet. Creating New View:

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This task shows how to create views. If the sheet is active, the first view you create is by default a front view. Dimension: Using the dimensions toolbar, we can create the following types of dimensions:

Linear

, Angular

, Radius

, Diameter

, Chamfer

, Thread

, Co-ordinate

, Chained

dimension system

, Stacked dimension system

, Cumulated dimension system

We can place a datum symbol and feature control frame by using tolerencing sub tool bar in Dimensioning tool bar. Generation: We can generate the dimensions automatically which are given in the 3D part at once by using generate dimension command . We can generate the dimensions step by step by using generate dimensions by using . We can generate the balloons and bill of materials for the and balloon command .

generate dimensions step by step command

assembly automatically by using generate bill of material Annotations:

Annotation is extra information asserted with a particular element in the drawing. We can place three types of annotations in the drawing sheet like text table , symbol and

. We can place the text in the drawing as text on the sheet, with a leader, replicates an linked

text, text in a balloon, text in datum target and we can specify the where text template should be placed. We can place the symbols like roughness symbols, welding symbol and weld in drawing and we can edit the required text data in the weld symbol. We can place the text tables in the drawing sheet by using table command and we can place an existing table by using table from csv. Dress-up:

We can create an axis, center lines, threads drawing by using dress-up commands.

, hatching

and arrows

in the

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Description: Introduction to CATIA V5