Tài liệu Giáo trình Catia P1 ppt

CATIA V5R16 Generative Shape Design Generative on Point Point Create a point in the 3D space Curve Create a point on a curve at a distance from a reference point.. CATIA V5R16 Generati

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CATIA V5R16 Generative Shape Design

CATIA V5

Parametric Surface Modeling

Version 5 Release 16

Generative Shape Design

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mo

Generative Shape Design Y Toolbars in Generative Shape Design

File Edit View Insert Tools Weinfrastructure » |

4 Analysis & Simulation » Sketch Tracer

| oot : Imagine & Shape

gal rave „ #3? Diaitized Shape Editor

= R SA Generative Shape Design Equipment & Systems

Digital Process for Manufacturing > gag” Quick Surface Reconstruction

Machining Simulation > dy Shape Sculptor

Ergonomics Design & Analysis >

Replication: Pattern, Powercopy

Analysis: Connection analysis, Draft analysis, curvature analysis

Surface-based Features: (On Part Design

Workbench), create a solid from surfaces,

modify the solid by a surface

Replication x!

REE S 6,

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Gì %2

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By Dickson Sham (ME dept, HKPU)

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Generative on Point

Point (Create a point in the 3D space)

Curve Create a point on a curve at a distance from a reference point Z= mm [Tangent on curve

Between

Plane Create a point on a plane at a distance from a reference point Point: Default (Origin)

Point on a Create a point on a surface at a specified distance and Axis System: [Default (Absolute)

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edge, or face), which is at the minimum or + | 2222 OAO

maximum distance on a curve, a surface, or a

fs

ection

Element: [No selection

Direction: [No selection @ max O Min

of ection

Direction 2: [No selection @ max O Min

Direction 3: [No selection @ max O Min

Optional directions Direction 2

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Line (Create a line in the 3D space)

Wireframe

_ ÑPoint-Direction

na fôngle/Normal ta curve

Create a line between two selected points OI <+ “Tangent to curve

Create a line that splits the angle between two

Bisecting Line lines into equal parts

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Plane (Create a plane in the 3D space)

Wireframe

Offset Plane Ù [ 7 Create a plane parallel to a reference plane offset

Plane type: Offset from plane vị

Angie or Normal aa Create a plane at an angle to a reference plane

to a Plane | J based on a rotation axis Reference: [parallel through point

om, 3 <> Create a plane passing through 3 points ‘ Througn three points

Reverse D Through point and line

Pane through 2 ao Create a plane passing through 2 lines LJ Repeat {through planar curve

k @ OK Tangent to surface

Point and a Line Ly? 5 mg a plane passing through a point and a Mean through points

Plane by an Create a plane by defining the components

Mean Plane " Create a plane defined as the mean through 3

through Points (J or more points

Plane Spaced | | | Create several planes spacedequally

Between 2 Planes | between 2 selected reference planes A-6

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CATIA V5R16 Generative Shape Design Generative %

Projection onto a support

Projection (project one or more elements

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Generative Shape Design ¥

Combine Curves

Combine Curves (create a curve resulting

from the intersection of the extrusion of two

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Reflect Line

Reflect Line (create curves for which the

normal to the surface in each point present

the same angle with a specified direction

They can be closed or open.)

The normal of surface

at all points along the curve is 38deg from 2x) the vertical axis

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Intersection

Intersection (create wireframe geometry by

Intersection curve between two surfaces

Intersection point between

a curve and a surface

Intersection curve between

a surface and a solid

A- 10

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Generative Shape Design &

Point: No selection Parameters

Parallel mode: Euclidean vị

Parallel corner type: |Sharp vị

@ None © Tangency © Curvature

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lf several solutions may

be possible, click the Next Solution button to move to another corner solution, or directly select the corner you want in the geometry

A- 12

Generative &S& Shape Design

Corner Definition oT) Xi

Corner Type: [3D Corner |

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Continuity: angency ¥ Tension: Ẹ

Curve: [Sketch.2

tangent-continuous or Tension: ft curvature-continuous

Reverse Direction i

L_] Trim elements

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spline Curve

Spline Curve (create a 2D/ 3D spline curve)

We can create an

additional line to define

the tangent direction at

A- 14

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@ Taper Angle: Pdeg q Way:[Tnuard vị

— @ oxK | Scancel | Preview |

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Extrude

Extrude (create a surface by extruding a

profile along a given direction)

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Remark: The axis must be a straight line

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Shape Design

Offset

Offset (create a surface, or a set of surfaces,

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Snape Design 3? oweep

Sweep (create a surface by sweeping out a

profile along one or two guide curves)

Sweeping an Explicit profile

- With reference surface (optional)

- With two guide curves (optional)

- With pulling direction (optional)

(We can use the above three options to

control the profile orientation)

Swept Surìiace Defiriition ?| x|

Profile type: & I eC |z¿|

Subtype: |Two limits M

Sweeping a Linear profile

- Two limits We first create a

Limit and middle guide curve (4 lines) With reference surface

With tangency surface

With reference curve

With two tangency surfaces With draft direction

surface by sweeping an inclined linear profile along a guide curve A- 19

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Two guides and radius

Center and two angles Center and radius Two guides and tangency surface

One guide and tangency surface

Swept Surface Definition

|_, Tangency: JNo selection

Angle: | Odea Law |

Guide curve 2: [No selection

ie Tangency: |No selection

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Fill (create a surface to fill the opening —=_

The four 5% points must

Passing through a point (optional)

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Multi-sections Surface

Multi-sections surface (create a surface by

sweeping two or more section curves along an

automatically computed or user-defined spine The

surface can be made to respect one or more guide

No | Section | Tangent | Closing Point |

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Shape Design

Blend (Create a surface between two

wireframe elements or surface edges)

First continuity: [Tangency vị

L ] Trim first support First tangent borders: [Both extremities vị Second continuity: [Tangency vị

L ] Trim second support

Second tangent borders: [Both extremities vị

_Replace | Remove | Reverse Í

= Le OK | @ Cancel | |i 3

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>¿ Extrude.3

*-Point.1

>-Point.2 + Line.1

The two original surfaces are hidden; a Join surface

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Shape Design

Split (split a surface or wireframe element by

means of a cutting element You can split a

wireframe element by a point, another

wireframe element or a surface; or a surface

by a wireframe element or another surface )

Cutting Element

Result by Original

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Extract

Extract (extract from elements (curves,

points, surfaces or solids)

= S Cancel | Preview |

All surfaces are selected

Extract Definition 2) x

Propagation type:|Point continuity vị

Element(s) to extract [ah sigillSi#e l1 ®|

C Complementary mode

L ]Federation Show parameters >> |

surfaces are selected

Extract Definition 2) xi

oO Complementary mode

(Federation

For this Case, the extracted

Show parameters >> |

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Bi-tangent Shape Fillet (create a shape fillet

between two surfaces)

Smooth: a tangency constraint

is imposed at the connection

between the fillet surface and

the support surfaces, thus smoothing the connection

Tri-tangent Shape Fillet (create a shape

fillet between three surfaces)

A- 28

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Edge Fillet (create a constant radius fillet

Radius: 0mm

Object(s) to filet: EM Bl

Propagation: [Tangency *Ỉ

[ ] Trim ribbons '@ Trim support

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Shape Design

Variable Fillet

fillet surface is obtained by rolling a sphere,

which radius would vary, over the selected

Yariable Radius Fillet Definition ?| xị

Support: ỈNo selection

C1 Trim ribbons _— and select the

Points: |No selection oT point Variation: | Cubic xị

'@ Trim support

More>> |

x @ 5‹ | @cacli| Preview J

Create a point along

the edge before

new value for

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seer ae on Face-Face Fillet

The fillet surface is obtained by rolling a

sphere, which radius is larger than the

distance between the selected elements,

between the selected surfaces )

Remark: This is a “Joined” Surface

between two faces that are not touching each other

A- 31

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Shape Design &

Tri-tangent Fillet

Tri-tangent Fillet (The creation of tritangent x

fillets involves the removal of one of the three Ì B8 3 „¬ _P

faces selected, as the fillet surface is =

obtained by rolling a sphere, which radius is

automatically computed to be larger than the

removed surface, between the selected

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‘otate, Symmetry, Scale

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Limit Type: |Length vị

Propagation mode: |None >:

Internal Edges: [Default (None) Bl

We can join the ——}_] Assemble result

extrapolated (J Extend extrapolated edges

surface with the — @ oœ‹ | BcCancel | Preview |

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First create a sketch

User pattern

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Distance - minimal distance between two vertices

Tangency - angle between two surfaces

Curvature Difference (|C2 - C1|) / (C1 + C2|) / 2)

Curve Connect Checker

(analyze how two curves are connected )

Distance - minimal distance between two vertices

Tangency - angle between two curves

Curvature Difference (|C2 - C1|) / (C1 + C2|) / 2)

A- 36

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Shape Design 5?

Draft Analysis

(analyze the draft angle on a surface)

(Remark: To view the draft result, we need to use the Shading

1 Click “Feature Draft Analysis

2 Define the color scale (e.g -1, 0, +1 deg)

3 Click the option “Compass” on the pop-up meg

4 Select all surfaces

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Shape Design

Create a New Geometrical Set

Object

& xy plane sketcher ;

7 yz plane Axis System

(Remark: Provided that Hybrid Design is = 2x plane Wireframe

" " >

disabled, a geometrical set will be created ot =

automatically when the first wireframe/ Geometvinal Seb}

surface/ plane is created)

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Số) Generative Part Design *

Split (by Surface)

File Edit View Insert Tools ‘Window Help

Remark:

The surface-based features (Split, Thick

Surface, Close surface & Sew) are available

only on Part Design Workbench

Lo? xy plane io 2x plane

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Generative

Part Design '*% Shape Design

Thick Surface

Thick Surface (add material to a surface in

two opposite directions or in one direction)

“> yz plane

oo 2x plane

GeiParameters PartBody

| © Sketch 1

~ 1 ThickSurface.1

Geometrical Set 1 -# Extrude,1

co Plane 1

ThickSurface Definition ?| xị First Offset: mm

Second Offset: 0mm Object to offset: [Extrude 1

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Close Surface

Close Surface (Add material inside the

enclosed surface so that a solid is created) Surface-Ba=- XI

< Extrude 2 Bet Extrude.3

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Part Design So Shape Design ¥

sew Surface

Sew Surface (a Boolean operation combining a

surface with a body This capability adds or

removes material by modifying the surface of the

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Exercise

Exercise 1

- Sweep/ Extrude/ Offset

- Blend/ Split/ Boundary

- Fill/ Join

Exercise 2

- Revolve/ Sweep/ Split

- Shape Fillet/ Extrude

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Click “Sketch” icon and select yz plane

° Draw an arc (R500) with one end (0,0) as shown Fig {

in Fig.1

° Click “Exit” to complete < 350 =

° Deselect Sketch 1

Click “Sketch” icon again and select zx plane 1 R 400

° Draw an arc (R400) with symmetric endpoints as °S-

shown in Fig.2 y7 ~ : Fig.2

° Click “Exit” to complete A- 44 a `

Tiêu đề	Catia V5r16 Generative Shape Design
Tác giả	Dickson Sham
Trường học	Hong Kong Polytechnic University
Chuyên ngành	Mechanical Engineering
Thể loại	Tài liệu
Năm xuất bản	2007
Thành phố	Hong Kong

Định dạng
Số trang	61
Dung lượng	3,95 MB