【转帖】gdt and shipbuilding

yang686526

gd&t and shipbuilding
can anyone tell me if the application of gd&t in shipbuilding is the same application as the automotive industry?
asme y14.5m-1994
1.1 general - this standard establishes uniform practices for stating and interpreting dimensioning, tolerancing, and related requirements for use on engineering drawings and in related documents.
i think this answers your question
best regards,
heckler
sr. mechanical engineer
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never argue with an idiot. they'll bring you down to their level and beat you with experience every time.
i agree.
it can be used for any type of mechanical design.
chris
systems analyst, i.s.
solidworks 06 4.1/pdmworks 06
autocad 06
yes on the surface that will work.
this is the area of iso that i think works better.
iso tolerancing is based on size and fit class.
a 25mm long part has tighter dimesnions than a 2500mm long part.
"wildfires are dangerous, hard to control, and economically catastrophic."
ben loosli
sr is technologist
l-3 communications
i have seen gd & t applied to nuclear generators so it certainly can be utilized in ship building.
the only problem comes in the confirmation methods. that could become a bit hairy since you probably have a 1 piece off situation and checking fixture may not apply.
dave d.
gd&t might fly in military shipbuilding.
in recreational shipbuilding, they still haven't actually grokked the concept of interchangeable parts, so gd&t would be a complete waste of time.
mike halloran
pembroke pines, fl, usa
gd&t was invented by shipbuilders, sort of.
i believe it was actually the part of the royal navy responsible for torpedo development.
looselib, i think you can achieve the same you just have to think about it a bit more.  plus there's more to gdt than size & fit class.
if you're in the us it's asme y14.5m, if the uk then bs8888, i'm sure other countries have there own standards.
bs8888 is essentially a list of all the relevant iso, en & bs specs and can be supplied as a kit.
so in essence i can think of no fundamental reason not to use it in shipbuilding.
let's see as i re  
some history:
i was reffering to the below item on drafting zone specific to gd&t as we know it today.  not general drafting standards or the concept of tolerance.
i think it started developing earlier than that.  in 1908, henry leland had won the dewar's trophy for technical innovation in 1908 by dismantling three of his cadillacs, mixing up the parts, and reassembling the cars.  previous to that, he standardized the colt pistol company to use interchangable parts.
it seems that the singer sewing machine company had a hand in the early development of interchangability also, but i don't have any sources handy to show that.