Surface vs Solid

8/12/2019 Surface vs Solid

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The use of Pro/ENGINEER Advanced Surfaces in

creating 3D geometry.


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Who am I ?

Victor HaansWorking for USG Innotiv

Division: Product Development

Function : Design Engineer

Experience: 13 years in Product Development,

approximately 10 years with pro/ENGINEER


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Introduction USG Innotiv (1)

USG Innotiv Product Development

Division of USG Innotiv (1500 people)

Part of USG People(20.000 people)

Development Capacity Consulting Training

Product Development


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Introduction USG Innotiv (2)

PD Consultancy & Training (services) Market leader Benelux for services of PTC products

Implementation

Migration

Process Support

Certified implementer / migrator of PTC databaseapplications

Certified Trainer Partner of PTC Products

Certified Service Partner in the Benelux

Pro/ENGINEER,Pro/INTRALINK, Windchill


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Goal of this presentation

Not familiar with Surface Modelling ?:

A brief overview of the added value of surface

modelling compared to solid modelling

Familiar with Surface Modeling ?:

Demonstration, with some new features in

WF4 to5


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Overview

When solid modeling, when surface modeling ?

Further advantages of surfaces

Forms of surface modeling: Style feature/ISDX vs.

Advanced Surface modelling Level of Parametrisation

Analysis of surfaces

Demonstration of (new) features


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What is Surface Modelling?

Creating geometry with interconnected

surfaces without thickness.

In pratice: The contour is first defined as a

surface and then made solid


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Solids vs. Surface

When surfaces, when solids?

> This question is not easy to answer

Eventually almost all parts end up as solids, but sometimes the way

to get here is easier in surfaces


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Solids vs. Surface: Rules of Thumb

SOLIDS Simple single Curved geometry (developable)

No complicated transitions between surfaces (rounds, curvature*)

Geometry can clearly be defined in orthoganal views

Solid geometry, thickness-hight/width ratio is small

Feature Creation often quicker

Outside Surface is Rigid

Selection of all outside geometry takes time


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Solids vs. Surface: Rules of Thumb

SURFACES

Complicated, double curved geometry

Complicated transitions between surfaces (Tangent, C2)

Geometry is hard to catch in orthoganal views

Thin shell like geometry

Somewhat more time consuming

More tweaking possibilities

Merged quilt, selection goes fast


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Example


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Further Advantages

Some things can only be done in Surfaces:Contour in a skelet model

Patch/replace or solidify feature

Round transitions

In general:

Surfaces are better when the outer contour is important and needs to be

defined first.

Surfaces regenerate faster (patterns !)


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Example

Skelet model split (Publish Geometrie)


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Adv surfaces vs Style feature

Style Feature/ ISDX

On the designers side

Final form does not exist

Concept orientated

VisualisatieFree form modelling, drag and drop

One Super Feature

Advanced surfacing

On the constructors side

Final form exists, end result

Production model, Drawings

Parametric control over model.More features


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Parametrisation

Parametric Control over a surface exists when

all characteristics of a shape are defined in

dimensions and these dimensions are coupled


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Parametrisation

Parametric control

Freeform surface

(op solid)

Style feature

Boundary surface Fill

Sweep

Blend

Swept blend

Extrude/revolveVar Sect Sweep


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Analysis tools

The most important ones:

Curvature

Offset

Shaded Curvature

Reflection

>> Demonstration


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Curvature

Wikipedia:

Curvature continuity

further requires the end vectors to be of

the same length and rate of lengthchange. Highlights falling on a curvature-

continuous edge do not display any

change, causing the two surfaces to

appear as one. This can be visually

recognized as perfectly smooth.


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Demonstration


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Demonstration


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Surface vs Solid

Documents

Transcript of Surface vs Solid