mman1130 – design and manufacture by s. kara school of mechanical & manufacturing engineering...

MMAN1130 – Design and Manufacture by S. Kara

School of Mechanical & Manufacturing Engineering

The University of New South Wales

MMAN 1130 DESIGN AND MANUFACTURE

CONCEPT GENERATION AND SKETCHING






Product Development Process

MANUFACTURE

Distribution

Use & Service

Disposal, Reuse, Recycling

Product

MANUFACURING OPERATIONS

MANUFACTURING ORGANISATION

External Feedback (Performance, DFE, etc.

Internal Feedback (Cost, DFM, DFA, etc.

MMAN1130 Project






SOLO Pump Project

Functional Specificatio

n

Concept Sketch

Engineering Drawings

Production Plan

Prototype Manufacturi

ng






Concept Generation and Sketching

Functional Specificati

on

Categorisation of

Functional Specification

Market Search

Initial Concept Sketch

Concept Sketch

Evaluation

Final Concept Sketch

Problem Formulation




…..the best way to get an idea is to get a lot of ideas…….

Linus Pauling

(1901 – 1994)





An outline of possible solution based on Product Design/Functional Specification (PDS) Splits the problem up into smaller

categories Two stages:

Concept generation (individual work) Concept evaluation (group work)





Concept Generation Research into the similar products in

the market place Develop ideas which will meet PDS Key points in order to communicate

ideas





PDS Evaluation Matrix List of important features required

from a product Appearance , Competition, Customer,

Documentation, Ergonomics, Environment, Installation, Product disposal, Lead times, Legal and safety implications, Legislation, Patents and copyright, Maintenance, Materials Packaging and transport , Performance Processes, Product cost, Product dimensions, Product life, Quality, Quantity, Standards, Testing





PDS Evaluation MatrixFeature

Categories

Product Features

Concept 1 Concept 2 Concept 3

Performance

Lower a load of 2.5 tonnesDraw in a cable at a rate of 0.25 m/s

Dimensions

Envelop dimensions (H, W)

Cost End user cost < $5000Manufacturing cost < $2500

Standards AS5000 part 99 Motor performanceAS6105 for insulation

Product Life

On the market for 10 yearsSpare parts for further 5 years

•Which ones are important for representing PDS???????





Use a suitable Concept Sketching Techniques Is 2D sketch enough ? Do you need 3D sketch? Do you need auxiliary views?

e.g. sectional views





Use a suitable Concept Sketching Techniques Oblique

Crudest and rarely used Look very unconvincing to the eye

Easy to learn Not really a '3D' system but a 2 dimensional view of an object with 'forced depth‘ Drawn in two dimensions, i.e. flat. The other sides are drawn in at 45 degrees but instead of drawing the sides full size they are only drawn with half the depth creating 'forced depth' adding an element of realism to the object.





Use a suitable Concept Sketching Techniques Isometric

constructing a 3 dimensional object without using perspective all lengths drawn at 30 degrees using their true length





Use a suitable Concept Sketching Techniques Axonometric

Interior designer, landscapers Drawing a plan view with a third dimension Plan view at a 45 degree angle with the depth added vertically





Use a suitable Concept Sketching Techniques Perspective

Three main system One, Two and Three point




Putting things together

Functional Specificati

on

Categorisation of

Functional Specification

Market Search

Initial Concept Sketch

Concept Sketch

Evaluation

Final Concept Sketch

Problem Formulation

Detail Design




Putting things together: Bicycle Case

Problem Statement: Designing an off-road bike for semi-professional market for pleasure and racing use





PDS / Functional Specification Dimensions

Envelop dimensions of 1.5mX1m Environment

Mainly used as an off-road bike Performance

Adjustable frame to suit for different market segments Should be less than 10kg Capable of carrying up to 100kg

Cost End user cost less than $1000 Manufacturing cost less than $500

Maintenance To be maintenance free except for light lubrication once a month and a recommended service every two years. Parts requiring lubrication should be accessible within 15 minutes without the use of special tools or equipment. All fasteners used should comply with AS6105. Spares should be available for 5 years after the product is replaced with a new model. No special tools should be required for maintenance.





Research into other products in the market





PDS evaluation MatrixFeature

CategoriesProduct Features

Concept 1 Concept 2

Performance Should be < 10kgCarrying up to 100kgAdjustable frame

Dimensions Envelop dimensions 1.5x1m

Cost End user cost < $1000Manufacturing cost < $500

Environment Off-road as a dirt bike

Maintenance Maintenance free except for light lubrication once a month and a recommended service every two years.Parts requiring lubrication should be accessible within 1 min without the use of special tools or equipment.All fasteners used should comply with AS6105.No special tools should be

required for maintenance.




Concept Sketch Submission Due Week 3, in Monday class

Check Moodle Sketch Guide Concept sketch assessment guides

mman1130 – design and manufacture by s. kara school of mechanical & manufacturing engineering...

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