Wednesday, July 27, 2016

Design for Manufacturing



Design for Manufacturing

1. Estimate the Manufacturing Costs
2. Reduce the Cost of Components
3. Reduce the Cost of Assembly
4. Reduce the Costs of Supporting Production
5. Consider the Impact of DFM Decisions on other Factors

Designing Products for Manufacture and Assembly (DFMA)

Product design has to ensure that manufacturing and assembly feasibility and cost are appropriately considered in the design process.

Reducing the number of parts is an important concern of DFMA. For this purpose for each separate part, the following questions are to be answered by the designer.

1. Does the part move relative to all other parts?
2. Must the part be made of different material?
3. Must the part be separate from all other parts to allow the disassembly of the product for adjustment or maintenance?


DFM Guideline
A1) Understand manufacturing problems/issues of current/past products
A3) Eliminate overconstraints to minimize tolerance demands.

P1) Adhere to specific process design guidelines.
P2) Avoid right/left hand parts.
P3) Design parts with symmetry.
P4) If part symmetry is not possible, make parts very asymmetrical.
P5) Design for fixturing.
P6) Minimize tooling complexity by concurrently designing tooling.
P8) Specify optimal tolerances for a Robust Design.
P9) Specify quality parts from reliable sources.
P10) Minimize Setups.
P11) Minimize Cutting Tools.
P12) Understand tolerance step functions and specify tolerances wisely.





Design for Manufacturability: How to Use Concurrent Engineering to Rapidly Develop Low-Cost, High-Quality Products for Lean Production - David M. Anderson - Book Information
http://nraoiekc.blogspot.com/2014/03/design-for-manufacturability-how-to-use.html

Recent Linkedin Article
26 July 2016
What is Design for Manufacturing or Design for Assembly
https://www.linkedin.com/pulse/what-design-manufacturing-dfm-assembly-dfa-declan-scullion


Updated 30 July 2016,  27 June 2016

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