Controlled radius Simliar or to on a diameter.
Controlled radius Simliar or to on a diameter.
(OP)
Please see pic. What I am after is a way to control a profile within the tolerance zones shown. The feature that I am after is on the left. The Feature on the right is what I do not want, which is the surface that has reverse of surfaces or sharp points. The Left feature I get when I use a boring bar to machine the bore and the right surface I get when I machine the same bore with the reamer. The reason for the difference is due to an interrupted cut during the boring/ reaming process. I am looking for a good way to call this out on the print with GD&t or some other way. We are using ASME 1994 standard.
Thanks
Shane
Thanks
Shane





RE: Controlled radius Simliar or to on a diameter.
RE: Controlled radius Simliar or to on a diameter.
RE: Controlled radius Simliar or to on a diameter.
Jim Sykes, P.Eng, GDTP-S
Profile Services www.profileservices.ca
TecEase, Inc. www.tec-ease.com
RE: Controlled radius Simliar or to on a diameter.
RE: Controlled radius Simliar or to on a diameter.
Jim Sykes, P.Eng, GDTP-S
Profile Services www.profileservices.ca
TecEase, Inc. www.tec-ease.com
RE: Controlled radius Simliar or to on a diameter.
RE: Controlled radius Simliar or to on a diameter.
John-Paul Belanger
Certified Sr. GD&T Professional
Geometric Learning Systems
http://www.gdtseminars.com
RE: Controlled radius Simliar or to on a diameter.
Jim Sykes, P.Eng, GDTP-S
Profile Services www.profileservices.ca
TecEase, Inc. www.tec-ease.com
RE: Controlled radius Simliar or to on a diameter.
In fact I think that concept of "controlled diameter" (as an extension of "controlled radius") could easily fall under that category too. This would most likely have to be done by placing additional note - as there is obviously no standard symbol for controlled diameter - but I do not see any major roadblock that would prohibit such practice. On the contrary, this could be quite interesting and useful idea in case of sealing surfaces for instance, where any abrupt changes in outline's form may significantly reduce sealing efficiency.
However in OP's case it seems to me, as Jim already noticed, that it is not the matter of feature's form error, but of properly defined size tolerance. Shane, would you have any issues with sharp points and reversals if the actual diameter on RHS picture was close to outer tolerance limit all around? Is there any other reason, beside poor press-fit, that makes RHS picture unwanted?
RE: Controlled radius Simliar or to on a diameter.