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How to control Warpage with GD&T

How to control Warpage with GD&T

How to control Warpage with GD&T

Hi Guys

I have an array of cavity's for a Relay, I want to control this like an array with TOP, but I need to control the warpage along to all cavity's.
the relay have 5 blade terminal and the Datum's is the surface (Datum A) and the both center planes are the second and third (Datum B & Datum C).
I'm thinking control the warpage with a composite control frame in the first control frame with a ToP for control the array, and the second control frame with profile.
Other way could be only with a profile of a surface control but I don't now if this can use with arrays.

How you control this kind of feature?

RE: How to control Warpage with GD&T

Usually, with a drawing.

You seem to have forgotten to include yours so that we can maybe understand what the hell you are talking about.

Mike Halloran
Pembroke Pines, FL, USA

RE: How to control Warpage with GD&T

If you are making a mold, send the drawing of the finished part. It is up to the mold maker to determine how to make the cavities so the parts come out right.

RE: How to control Warpage with GD&T

Dang, with the capitalization, I read "War page".

John Acosta, GDTP Senior Level
Manufacturing Engineering Tech

RE: How to control Warpage with GD&T

If I understand what you are after then composite profile would work. The only question would be what (if any) datums you repeat in the lower segment.

If your design intent is really to simply protect a virtual condition boundary then you could also use combined controls (figure 8-24).

RE: How to control Warpage with GD&T

The five blade terminals owns different size on the slot length (2X 6.8±0.1 Sec A-A and 3X 5.1±0.1 Sec B-B), so the upper two blade terminals is a pattern and the lower three is an another pattern. For these different size patterns of features, you may use each slot’s length and width as datum feature B and C, then you need to add “2X INDIVIDUALLY” notation beside the datum feature B and C symbol on the upper pattern. You may do it the same ways on the lower pattern, please ref to 2009 STD. Figs. 7-26 and 7-37 for details should you have any question.

Agree composite profile or position and profile combined controls to control the wall warpage.


RE: How to control Warpage with GD&T

Thanks @SeasonLee

you really help me with your answer, I'm don't know as well the standard 2009, but I know I have one, so I need to study...

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