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Chapter 3

3D Part Modelling and Assembling

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Introduction Parametric is a term used to describe a dimension’s ability

to change the shape of model geometry if the dimension

value is modified.

Feature-based is a term used to describe the various

components of a model.

Parametric modelers are featured-based, parametric, solid modeling design program.

In parametric modeling, dimensions control the model.

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Part Modelling using CAD Software Any Design Automation Software Package Used to

Produce Parts Assemblies Drawings

3-D Object Creation Procedure

By Creating Features

Each Feature: 2-D Sketching & then 3-D Formation

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2-D Sketching Parametric Modeling

Procedure Sketch the geometry Dimension the geometry Modify the dimension values

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2-D Object Creation Methods Sketch Entities

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2-D Object Creation Methods Sketch Tools

Dimensioning

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Dimensioning Dimensions->Smart

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Relations Relations

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Features Examples

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Features Examples

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Features Examples

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Reference Geometry

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Viewing Examples