*****Last Ten Active Topic***


EXAM FOR SECTION A
project work 2018
AD302 material science summer 2018
Free download question paper of material science winter 2016
Notes for Pulse & Digital circuit
Free Download AMIE Section A study notes on AD 302
Result of lab and project
AMIE WINTER 2017 RESULT HAS BEEN DECLARED
Query related to re registration of section b
study notes

 

 

 

 

 

Registration Running on Online Classes for AMIE Summer 2018 Click Here to Register

study note of FDM : Specific Design Rules

Download excellent quality study note and ebooks of amie section a in pdf,ppt,doc format

study note of FDM : Specific Design Rules

Postby subham » Fri Oct 12, 2012 12:16 pm

A number of DFM rules for design, more specific than the preceding guidelines, have been developed.
1. Space holes in machined, cast, molded, or stamped parts so they can be made in one operation without tooling weakness. This means that there is a limit on how close holes may be spaced due to strength in the thin section between holes.

2. Avoid generalized statements on drawings, like “polish this surface” or “tool marks not permitted,” which are difficult for manufacturing personnel to interpret. Notes on engineering drawings must be specific and unambiguous.

3. Dimensions should be made from specific surfaces or points on the part, not from points in space. This greatly facilitates the making of gages and fixtures. The use of GD&T methods makes this point moot.

4. Dimensions should all be from a single datum surface rather than from a variety of points to avoid overlap of tolerances.

5. The design should aim for minimum weight consistent with strength and stiffness requirements. While material costs are minimized by this criterion, there also will usually be a reduction in labor and tooling costs.

6. Whenever possible, design to use general-purpose tooling rather than special dies, form cutters, and similar tools. An exception is high-volume production where special tooling may be more cost-effective.

7. Use generous fillets and radii on castings and on molded, formed, and machined parts.

8. Parts should be designed so that as many operations as possible can be performed without requiring re-positioning. This promotes accuracy and minimizes handling.

It is valuable to have manufacturing engineers and specialists involved in design decision making so that these guidelines and others they bring can inform the process.
ImagePlease like us in facebook to help you more and get all update...@http://www.facebook.com/AMIE.NBCAFE
subham
Site Admin
Site Admin
 
Posts: 955
Joined: Sun Apr 29, 2012 11:23 pm

Return to Design and Manufacturing (AD 301))

Who is online

Registered users: Bing [Bot]