Assembly Variation Analysis
Assembly Variation Analysis
(OP)
Can anyone comment on useful methods to study potential assembly variation caused by piece part variation? I am interested in analyzing the design of a sheet metal sub structure comprised of 15 to 20 parts that will be welded togeather. Some parts are hard tooled, others are formed on a brake. Normal process variation is known for all parts.
My goal is to estimate an achievable gap tolerance for a 5 piece thermoformed housing that will be supported by the substructure. The overall size of the assembly is 2.5 m x 1 m x 1 m.
My goal is to estimate an achievable gap tolerance for a 5 piece thermoformed housing that will be supported by the substructure. The overall size of the assembly is 2.5 m x 1 m x 1 m.





RE: Assembly Variation Analysis
Igor
RE: Assembly Variation Analysis
I performed a Google search and there are some good links to check out:
www.google.com/search?hl=en&lr=&ie=ISO-8859-1&newwindow=1&safe=off&q=flexible+tolerance+analysis&btnG=Google+Search
The basic principle is similar to springs in series, in that the stiffest component will dominate the variation in the joined structure. It is obviously best studied with FEM.
There are also some technical papers I remember on the topic. I will be back in the office on Thursday and can look them up for you.
Best regards,
Matthew Ian Loew
Please see FAQ731-376 for tips on how to make the best use of Eng-Tips Fora
RE: Assembly Variation Analysis
I am a new member in this forum. I am looking also information about final assembly variation.
If you got some informations, could you tell me as well.
Regards,
Yupiter
RE: Assembly Variation Analysis
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RE: Assembly Variation Analysis
RE: Assembly Variation Analysis
There are several companies and softwares available in the market to predict the effect of component tolerances on assembly process variation. Monte Carlo simulation methods are utilized to predict the overall variation.
If you need further information feel free to send me an email..I might be able to answer your questions. I've worked on several projects of this nature utilizing Monte Carlo and non-monte carlo methods.
RE: Assembly Variation Analysis
Since I am new in this field, I would like to know more about this. I am looking for any information, how to predict the effect of component tolerances on assembly process variation. Could you please send me any reference about this problem (with or without monte carlo method)?
Thank you very much !
Yupiter
(yhpm@hotmail.com)
RE: Assembly Variation Analysis
An Introduction to Tolerance Analysis of Flexible Assemblies
K. G. Merkley, K. W. Chase, E. Perry
Brigham Young University
Provo, UT
www.mscsoftware.com/support/library/conf/wuc96/06b_merk...
Also, as pointed out by bobosui (www.eng-tips.com/userinfo.cfm?member=bobosui), Professor S. Jack Hu has authored many publications. A list of these publications can be found at http://www-personal.engin.umich.edu/~jackhu/publication.... Nearly all of the publications that I indicated I would post (almost a year ago
Best regards,
Matthew Ian Loew
"Luck is the residue of design."
Branch Rickey
Please see FAQ731-376 for tips on how to make the best use of Eng-Tips Fora.