3.2: Graphic Modelling

graphic model

a visualisation of an idea often created on paper or through software

• sketching-formal drawing- 2/3D perspective-assembly drawing

• many forms, but main function is to simplify data and present it in a way that aids further development or decision

• Designers utilize graphical modelling as a tool to explore creative solutions and refine ideas from the technically impossible to the technically possible

sketching

Rough drawings of ideas used to convey or refine the idea.

advantages:

• communicate ideas quickly among colleagues

disadvantages:

• cant take idea to manufacture

formal drawing techniques

A type of drawing technique that has fixed rules, the most widely used being isometric projection and perspective drawing.

• perspective

• isometric

formal drawings

• Ruled out and accurate drawings

• orthogonal, isometric, exploded isometric, sectional, parts and assembly drawings

• usually done with technical equip or CAD programs

• represent a more resolved idea

advantages:

• accurate

• can be used to construct

• different views shown that you cant see from a 3D drawing

disadvantages:

• time consuming

• requires high level of skill

• specialist drawing equip needed

perspective drawing

To show what a product will look like when finished in a more lifelike way.

A set of formal drawing techniques that depicts an object as getting smaller and closer together the further away they are.

• 1, 2, 3 point perspectives

advantages:

• Looks like the real thing, it is pictorial

• Easy to communicate with client

disadvantages:

• No details – dimensions, etc

• Time consuming

• Distorted- not fully accurate view

projection drawings

 Systems of drawings that are accurately drawn, the two main types are isometric projection (formal drawing technique) and orthographic projection (working drawing technique).

isometric drawing

Used to accurately show what a product would look like when finished

advantages:

• Shows all views at once

• Easy to communicate with manufacturer and client, not distorted

• Represent measurements

disadvantages:

•  Not all details are included.

• Need specialised skills such as using CAD

• Specialised equipment needed.

orthographic projection

for manufacturers, when design fully developed

advantages:

• Detailed

• Contains all necessary information.

• Can construct from it.

• Accurate and precise.

• Easy to communicate with manufacturer.

disadvantages:

• Need specialised skills such as using CAD

• Specialised equipment needed.

• Time consuming.

• Not easily understood by a lay person (e.g. client).

scale drawings

Drawings that are bigger or smaller than the real product, but exactly in proportion with product.

part/assembly drawings

Term:Assembly Drawing – A diagram that shows how components fit together to make a whole drawings Typically presented in an exploded view (exploded isometric).

Term:Parts (Component) Drawing – Orthographic drawings of the components of an assembly containing details just about that component.

advantages:

• Easy to communicate with manufacturer and client.

• Show how product should be assembled.

disadvantages:

• Time consuming

• Specialised knowledge and skills required.