DSG325-Intro to DFM

Lecture 1 and 2

What is the definition of DFM?

a facet of design that focuses on ease of

1. manufacturing individual components and

2. assembling the collective that forms the complete product

what are the objectives of DFM?

• estimate manufacturing coast

• reduce cost of components

• reduce cost of assembly

• reduce the cost of supporting production

  • assembly line, fixture, tools/dies etc

• improve quality of product

what are the characteristics of DFM?

• requires that manufacturing is considered early in the design cycle

• minimizes manufacturing operations, components, and opportunities for manufacturing error

• often requires integration between engineering and manufacturing teams

• focuses on coast, quality, and accuracy of manufacturing over pure form/function

• should be applied with balance when in conflict with other design considerations

what are the benefits of DFM?

• lower COGS, higher profit

• encourages standardization and modularity

  • reoccurring “design language” recognized by customer, yields brand loyalty

  • more inter- company compatibility (ex: apple ecosystem)

• overall time to market decreased

• better serviceability (sometimes)

what are the 10 guidelines of DFM?

1. reduce the total numbers of parts

2. develop a modular design

3. use of standard components

4. design parts to be multifunctional

5. design multi-use parts

6. design for ease of fabrication

7. avoid separate fasteners

8. minimize assembly approach directions

9. maximize compliance

10. minimize handling

observing the DFM guideline of designing modular parts means that the end customer will be able to use your product interchangeably with other similar products

true or false

false

Describe the difference between

a) designing multifunctional parts

b) designing multi-use parts

a) when you design for multifunctional you combine two separate functions into one feature

b) multi-use parts are the same part just used in different places across the design, they perform the same function

how can you attach two components together in a way that does not require fasteners like screws or bolts?

snaps, glue, welding, etc.

what kind of features can be added to parts to make assembly go faster?

• add chamfers to holes to make the parts go in easier

• make it obvious where things connect aka poka-yoke

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