This is the presentation about design for assembly..

2. Shahtaj Keerio
14IN68
Presentation Topic
Design For Assembly

3. Contents
 History
 Design for assembly
 Purpose of design for assembly
 Assembly Methods
 Conclusion
 References

4. History
 1960s-1970s the first evaluation method was
developed at Hitachi and called assembly
evaluation method (AEM).
 Starting in 1977 Geoff Boothroyd developed the
design for assembly method (DFA).

5. Design For Assembly
 “A process for improving product design for easy
and low-cost assembly, focusing on functionality
and on assemblability concurrently.“
OR
 It is a process by which products are designed with
the ease of assembly in mind.
 If product contains fewer parts it will take less time
to assemble there by reducing assembly costs.

6. Purpose Of Design For
Assembly
 Reduce cost of assembly
 Improve quality and reliability
 Reduce part inventory
 Reduce production equipment

7. Assembly Methods
 Manual assembly
 Fixed automatic assembly
 Flexible automatic assembly Design for
Assembly

8. Design Guidelines For
Manual Assembly
 eliminate the need for workers to make
decisions or adjustments.
 ensure accessibility and visibility.
 eliminate the need for assembly tools and
gauges (i.e. prefer self-locating parts). Design for
Assembly

9. Design Guidelines For
Automated Assembly
 reduce the number of different components by
considering
 does the part move relative to other parts?
 must the part be isolated from other parts
(electrical, vibration, etc.)?
 must the part be separate to allow assembly
(cover plates, etc.)?
 use self-aligning and self-locating features
 avoid screws/bolts.

10. Conclusion
 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.
 Optimization of the part/system assembly.
 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.

11. References
http://www.slideshare.net/LeicesterColTechEngCen
tre/design-for-assembly