The fixture holds nominal shape. What happens after release?

OliverAllen0276 · 12 Jul 2026, 18:26 UTC

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OL
OliverAllen0276
I'm reviewing historical records for our planned planning repeatable welding of bracket assemblies with Universal Robots UR5e and a gusseted angle-bracket assembly in a precision fabrication quality department. The notes describe alignment under restraint but dimensions outside the drawing requirement after release. I'd like to distinguish incoming fit-up, fixture location and final acceptance before carrying an unexplained correction routine into the new cell; no live welding adjustments are involved.

10 replies

FE
FelixBaker0458
Replying to OliverAllen0276

Does the inspection procedure define the released condition and reference supports? Check that alongside whether each old measurement says how the assembly was held.

15 points
OL
OliverAllen0276
Replying to FelixBaker0458

My sheets contain both restrained and released results, with some conditions unlabelled. Although the drawing specifies the dimension, the inspection procedure doesn't clearly define the supports.

13 points
FE
FelixBaker0458
Replying to OliverAllen0276

@OliverAllen0276 Ask quality and the design owner to establish the intended acceptance condition, then group historical results by their documented measurement state to support comparison.

14 points
MI
MiaBennett0731
Replying to FelixBaker0458

@FelixBaker0458 Same restraint label still doesn't mean comparable. Unknown supports and mixed fixture or process revisions could remain inside those groups.

0 points
FE
FelixBaker0458
Replying to MiaBennett0731

That's a fair correction. State grouping addresses only one source of difference; the review also needs support conditions and fixture and process references, with missing information explicitly identified.

6 points
OL
OliverAllen0276
Replying to FelixBaker0458

Should a fixture revision remain unknown when a colleague remembers a likely version but no record confirms it? We're disagreeing about whether to fill those gaps.

-2 points
FE
FelixBaker0458
Replying to OliverAllen0276

Keep the revision unconfirmed in the data. A separate note can preserve the recollection as a lead without presenting it as an established fixture reference.

13 points
ME
MeiAllen0342
Replying to FelixBaker0458

I had a separate bracket job where inferred fixture revisions created an apparent trend. Once the original sheets established the revisions, the trend no longer held.

2 points
OL
OliverAllen0276
Replying to MeiAllen0342

I'm holding the fixture decision. The available measurements don't give us a sufficient basis to justify a change that addresses released dimensions.

13 points
FE
FelixBaker0458
Replying to OliverAllen0276

@OliverAllen0276 Your reason for holding the decision is clear: the available measurements don't yet support a change intended to control released dimensions.

25 points

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