CAD Modelling/Drawing

3D CAD Modelling types - Wireframe

These types of drawings only show the structure of the object drawn.

No other details are shown.

3D CAD Modelling types - Surface Rendered

These types of drawings show the objects as solid shapes.

3D CAD Modelling types - Surface Rendered You can view surface detail as a rendered block. It looks realistic due to the highlights and shading

generated by the package. This allows high quality drawings to be produced

very quickly. This allows high quality drawings to be produced

very quickly. It also means that very realistic models of a

design can be produced without having to manufacture them, saving design firms time and money.

3D CAD Modelling Types – Solid

3D model is built up using simple geometric forms such as cones, cylinders, prisms and cuboids.

These can be added or subtracted to produce complex 3D models.

3D CAD Drawings

As all 3D packages use different commands to produce shapes so you will not be asked to name any of these commands in your exam.

You should however, be aware of some of the things that can be done using these packages.

3D CAD Drawings There are certain things common to all 3D

packages and this is how the shapes are produced.

You can: combine shapes subtract them from each other add them together obtain the orthographic views of the 3D object

using one command.

3D CAD Drawings - Combining Shapes Shapes can be combined.

3D CAD Drawings - Subtracting Shapes Shapes can be subtracted from each other.

3D CAD Drawings - Adding Shapes You can add shapes to each other.

3D CAD Drawings - Orthographic Views

You can use one command to obtain the 3 orthographic views of the object.

Elevation

Plan

End Elevation

3D CAD Drawings There are a huge number of other things you

can do with 3D CAD packages. It is because of the speed that these very

realistic drawings can be produced at that design companies have moved to using these type of drawing packages.

3D CAD Drawings - Advantages An orthographic drawing of an object can

be produced by the software by clicking a button.

Very realistic objects can be designed very quickly.

Because these designs are so realistic and can be made to look like the actual material they will be made from, clients can see exactly what is being made so a physical model is not required, reducing costs and the time it takes to design a new product. Return