Need a diameter symbol on the inspection report? 1

[SeasonLee]

A simple question:

1. Shall we need a diameter symbol on the inspection report?
2. If yes, then shall we need a R in front of a radius measuring data on item 1 and 4? See attached.

I was told ASME will release a standard regarding the GD&T inspection report in 2014, is that true?

Thanks for the help

Season

 

[JNieman]

Attachment didn't come through.

We place symbols where they apply. We have had some customers require it. We've had inspectors decline to buy off parts until our reports included such symbols. I do not know that there is a rule, unfortunately.

_________________________________________
NX8.0, Solidworks 2014, AutoCAD, Enovia V5

 

[SeasonLee]

Sorry, forgot the attachment, my bad.

Season

 

[Belanger]

I don't see it as a big deal. If we were to insist on a diameter symbol in front of the written-in data for item #5, wouldn't we also need an R in front of the written-in data for lines 1 and 4?

John-Paul Belanger
Certified Sr. GD&T Professional
Geometric Learning Systems

 

[dgallup]

You have the diameter symbol in the left hand specification column. I think that is enough. The data columns are just that, data. I prefer to get this in an excel file rather than hand written so I can automatically calculate means, ranges, etc. and use conditional formatting to highlight any non-conforming measurements. None of that is possible if there is a symbol in with the data.

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The Help for this program was created in Windows Help format, which depends on a feature that isn't included in this version of Windows.

 

[Tunalover]

I recall getting an inspection report from a vendor with data written in for features with non-basic dimensions but all features with basic dimensions under geometric control were left blank. A phone call revealed that the inspector didn't know GD&T. My boss picked the vendor. He didn't understand GD&T either. The vendor had the word "Precision" in its name and the owner claimed to be a gauge maker and fluent in GD&T. Sigh...




Tunalover

 

[ctopher]

It doesn't hurt to have it shown. It does make it easier to read as a diameter when the report gets full.

Chris, CSWA
SolidWorks 14
ctopher's home
SolidWorks Legion

 

[CheckerHater]

Agree with dgallup on use of spreadsheets.

Also, do you really measure diameter when using caliper / micrometer? So, your drawing specification has diameter, and your measurement...

 

[ctopher]

I agree with CheckerHater,
Diameters should never be measured with a caliper.

Chris, CSWA
SolidWorks 14
ctopher's home
SolidWorks Legion

 

[dgallup]

tunalover - I've had similar experience with vendors with "Quality" in their name, it's the only place they have it.

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The Help for this program was created in Windows Help format, which depends on a feature that isn't included in this version of Windows.

 

[UchidaDS]

CheckerHater/ctopher:

Slightly off topic here, I am not sure about this:

"Also, do you really measure diameter when using caliper / micrometer? So, your drawing specification has diameter, and your measurement... smile "

I might missing some information here, but kindly correct me.
If it is Outer Diameter, I think that is fine.
But for Inner Diameter, then I see the potential problem.

 

[CheckerHater]

I was only trying to say that measurement is only part of verifying the “diameter”.
You cannot be sure the part is actually round using only “across” measurement.
In fact, using “go-no go” gauge may tell you more about “diameter” than measurement.

I would be more worried about specifying HOW diameter was measured, than about using diameter symbol.

 

[UchidaDS]

Yeah, I agree with you.
I think if you use CMM, you could measure few points (not saying scanning method) and obtained the diameter as well as roundness (computed).It is all about how much time/money to spend.
Gauge method is good, but for large diameter, I think this is difficult for handling.

 

[ewh]

forum286 may be a more pertinent location for this question.

“Know the rules well, so you can break them effectively.”
-Dalai Lama XIV

 

[rsm7400]

At my company I enforce putting all symbols and even feature frames into the specification columns. This is easy with the use of our GD&T font (it even draws the feature frames based upon characters entered, and works with any microsoft office product!). In the actual measurements columns we never use symbols, but this is because of the way we use the cells to compile data across multiple inspections.

________________________________
Ryan M
Quality Engineer
3d Printer Hobbyist

 

[MikeHalloran]

The few inspection reports I have done were in Excel, not in any particular form, but included columns for:
location on dwg
nominal size
tolerance
{diameter|radius|linear}
actual measured dimension
method of measure {gage pin| caliper| whatever}
calculated flag for {in tolerance | not in tolerance} sometimes with color
comment




Mike Halloran
Pembroke Pines, FL, USA