Profile of surface applied to irregularly shaped features with drafts
Profile of surface applied to irregularly shaped features with drafts
(OP)
Hello,
I would like to use profile of a surface to tolerance some features in my application (attachment). However the issue is a little bit tricky, because these features have got irregular cross-sectional shape and additionally drafts on the walls. I am afraid the way I did it is not exactly in agreement with ASME Y14.5M-1994, but on the other hand I think there is no suitable example in the standard that shows the method of tolerancing such type of features.
I am curious what do you think about it. Any hints or remarks?
pmarc
I would like to use profile of a surface to tolerance some features in my application (attachment). However the issue is a little bit tricky, because these features have got irregular cross-sectional shape and additionally drafts on the walls. I am afraid the way I did it is not exactly in agreement with ASME Y14.5M-1994, but on the other hand I think there is no suitable example in the standard that shows the method of tolerancing such type of features.
I am curious what do you think about it. Any hints or remarks?
pmarc





RE: Profile of surface applied to irregularly shaped features with drafts
Peter Stockhausen
Senior Design Analyst (Checker)
Infotech Aerospace Services
RE: Profile of surface applied to irregularly shaped features with drafts
I'm not keen on using datum references at MMC for surface profile. It's like saying "here is where I want this feature to be in x-y-z-space, but now I'm going to let it shift around...". Last I can recall, CMM (contact or vision) software weren't providing the datum shift with surface profile; may have changed, but I haven't heard of it.
Jim Sykes, P.Eng, GDTP-S
Profile Services www.profileservices.ca
TecEase, Inc. www.tec-ease.com