I'm reviewing historical records for our planned reviewing fixtures for welded mounting brackets with Universal Robots UR5e and a gusseted steel support bracket weldment in a welded-bracket fabrication workshop.
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.
Does the inspection procedure define the released condition and reference supports? Check that alongside whether each old measurement says how the assembly was held.
@AlexAli0211 The sheets mix clamped checks and released measurements. Some don't say which. The drawing has the dimension, but our procedure leaves the support condition vague.
@AdaBrown0912 Have quality and the drawing owner define the acceptance condition. Group the old results by known measurement state; that should make them comparable.
@AlexAli0211 Grouping by restraint state won't fully establish comparability if reference supports, fixture revisions or process revisions differ or remain unknown within each group.
@MiaCarter0992 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.
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.
@AdaBrown0912 Mark it unknown. You can note the recollection separately as something to investigate, but don't turn a probable revision into a recorded fact.
@AlexAli0211 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.
Because the required inspection condition may be after release. Holding a shape under restraint doesn't establish the shape the assembly takes without that restraint.
I've had the drawing owner confirm the released inspection condition and its reference supports. Quality is adding those requirements to the sheet so the measurement state is explicit.
For the linked samples, add incoming fit-up observations beside released results. Your welding engineer can assess any association within the documented process conditions.
I've found varying incoming fit-up in the traceable records for assemblies that changed shape after release. The association is visible, although it doesn't establish causation.