Which check should define acceptance for our released gusset bracket?

SamAllen0333 · 26 Oct 2025, 19:12 UTC

Closed
SA
SamAllen0333
I need the FR5 fixture brief to distinguish locating a bracket during welding from accepting the finished assembly. Our example is marked aligned in jig, then fails a released dimension. The production route also lists correction, with no time against it. Which comparison would expose what that operation is doing?

19 replies

LU
LucyCarter1002
Replying to SamAllen0333

Use identified parts through the stages. I withdrew an in-fixture pass claim in another review because the photograph did not show a measurement. What does aligned mean on your sheet?

21 points
EM
EmmaBrown0898
Replying to SamAllen0333

And what released dimension failed? The correction may be addressing something other than the alignment the fixture operator checks.

8 points
SA
SamAllen0333
Replying to LucyCarter1002

Lucy, aligned means the upright contacted the fixture stops. Emma, the released check is hole-axis position relative to the base. There is no corresponding in-fixture reading of that feature.

6 points
CH
ChloeBaker0483
Replying to SamAllen0333

Then don't ask the operator to defend a dimensional pass they never made. Their stop check can still be useful for explaining how the part was loaded.

0 points
LE
LeoChen1145
Replying to SamAllen0333

Put the actual supports beside the released readings. Otherwise before correction and after correction may use different setups and still end up in one attractive column.

19 points
LU
LucyCarter1002
Replying to ChloeBaker0483

Chloe, agreed. The useful question is whether the stops locate the incoming assembly as intended, followed by what the released part measures. Calling one check wrong does not supply the missing one.

5 points
SA
SamAllen0333
Replying to ChloeBaker0483

The operator is happy to show the fit-up check. He is less happy that the estimate treats correction as zero time. I have left that allowance open rather than carry forward the blank.

7 points
EM
EmmaBrown0898
Replying to SamAllen0333

That is reasonable, Sam, but do you know whether every assembly is corrected or only the ones that fail? The estimate will need that distinction.

8 points
CH
ChloeBaker0483
Replying to EmmaBrown0898

Emma, yes. We had a route instruction people signed even when they just checked and passed the part along. The tick did not mean they had worked on every one.

10 points
LE
LeoChen1145
Replying to ChloeBaker0483

A timed observation could record check-only and correction separately. Let the process and quality people define the trial, though; a stopwatch won't decide whether the method is suitable.

19 points
SA
SamAllen0333
Replying to EmmaBrown0898

There is no per-part correction record. The supervisor says some need it and some do not. We have asked fabrication and quality to define a small traceable comparison before timing the route.

13 points
LU
LucyCarter1002
Replying to SamAllen0333

Use the current drawing and incoming component revisions in that comparison. Our fixture review needed those too, because finished corrected examples could not explain the earlier fit-up.

6 points
EM
EmmaBrown0898
Replying to SamAllen0333

Sam, does the proposed fixture contact the same surfaces as the old one? I would keep that difference visible if it does not.

0 points
SA
SamAllen0333
Replying to EmmaBrown0898

Two contacts move in the proposal. The toolmaker has marked them on the current component drawing, revision E, and quality is defining the released check against assembly revision H.

23 points
LE
LeoChen1145
Replying to SamAllen0333

Good to have both revisions named. Are the retained parts actually to those component and assembly revisions?

17 points
CH
ChloeBaker0483
Replying to LeoChen1145

Leo's question is worth the nuisance. We found old stock used for a demonstration because it was already on the bench, while everyone discussed the new drawing.

6 points
SA
SamAllen0333
Replying to LeoChen1145

The retained example predates component E. It will stay as an old failure example, not the trial specimen. Current components have been selected for the planned comparison.

24 points
LU
LucyCarter1002
Replying to SamAllen0333

That leaves the trial able to answer the current fixture question. Keep the old failure and its different revision visible in the background, without asking it to justify the new contact arrangement.

7 points
SA
SamAllen0333
Replying to LucyCarter1002

Trial plan is agreed, results still pending. The buying review now shows the fixture cost separately from an unresolved correction allowance. That is less convenient than the original estimate, but it is usable.

11 points

Discussion closed

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