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Design for Manufacturing is a suite of 8 principles that allows us to implement good manufacturing practices..

Principle of DFM

Design for Manufacturing is a suite of 8 principles for implementing good manufacturing practices.

Principle

Description

Example

Understand the problems of production

Use the knowledge of all to develop a “checklist ” of good manufacturing practices.

It is not uncommon to find checklists with several hundred criteria: size of identical screw…

Rely on process-specific design rules

Use process-specific ABACs to design parts.

Identify tolerances for robust design

Use the method Taguchi.

Design to be easily assembled

Use the method of DFA.

Use reliable materials and processes

It costs 10 times more expensive to repair a defect in the next step. We have to make sure that our choices are reliable.

Minimize serial change times

Design so that many dimensions can be machined in the same cycle, without dismantling.

Minimize the use of cutting tools, and their complexity

If possible, use a design to allow the use of mold, forgings…

For machined parts, reduce the amount of tools needed.

Instead of…

… choose

Machine with cutting tools

Casting, forging, press

Cutting and welding

Extrusion and forming

Cutting thread

Threading by rolling

forging

Composite materials to form

Composite material film to be formed

Pultrusion, Film with incorporated resin

Sticky label

Molded printing

Use materials that are easier to work with and less expensive

Choose the materials at the most just in relation to the need. The table opposite can help us in our choice.

Instead of

choose

High strength steel

Low resistance steel

Aluminium

Fiberglass

Polycarbonate

Polypropylène

Antifriction steel

Antifriction plastic

Solid wood

Wood fiber

Metal

Wood

Papier, Plastic

Mrecycled materials

Solvent-based paint

Powder paint

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