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ASSEMBLY

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Design for (Cost Effective) Assembly and Manufacturing

 

Design for Assembly DFA:

While designing a product it is vital that we have a multi layer approach. This method makes it easier to eliminate quality and assembly issues at the production stage. Basically we aim to design a product that can be assembled easily.

‘…Optimization of the part/system assembly’

DFA is a tool used to assist the design teams in the design of products that will transition to productions at a minimum cost,focusing on the number of parts, handling and ease of assembly.

Design for Manufacturing DFM:

Definition: DFM is the method of design for ease of manufacturing of the collection of parts that will form the product after assembly.

‘Optimization of the manufacturing process…’

DFA is a tool used to select the most cost effective material and process to be used in the production in the early stages of product design.

Differences

Design for Assembly (DFA)

  • concerned only with reducing product assembly cost
    • minimizes number of assembly operations
    • individual parts tend to be more complex in design

Design for Manufacturing (DFM)

  • concerned with reducing overall part production cost
    • minimizes complexity of manufacturing operations
    • uses common datum features and primary axes

Similarities

  • Both DFM and DFA seek to reduce material, overhead, and labor cost.
  • They both shorten the product development cycle time.\
  • Both DFM and DFA seek to utilize standards to reduce cost

Terminology

Design for Manufacturing (DFM) and Design for Assembly (DFA) are now commonly referred to as a single methodology,

Design for Manufacturing and Assembly (DFMA).

  • Minimize part count
  • Design parts with self-locating features
  • Design parts with self-fastening features
  • Minimize reorientation of parts during assembly
  • Design parts for retrieval, handling, & insertion
  • Emphasize ‘Top-Down’ assemblies
  • Standardize parts…minimum use of fasteners
  • Encourage modular design
  • Design for a base part to locate other components
  • Design for component symmetry for insertion

DFA Process

Step 1

  • Product Information: functional requirements
  • Functional analysis
  • Identify parts that can be standardized
  • Determine part count efficiencies

Step 2

  • Determine your practical part count

Step 3

  • Identify quality (mistake proofing) opportunities

Step 4

  • Identify handling (grasp & orientation) opportunities

Step 5

  • Identify insertion (locate & secure) opportunities

Step 6

  • Identify opportunities to reduce secondary operations

Step 7

  • Analyze data for new design

production florida manufacturing assembly prototyping industrial design