Which bracket dimension was checked before the straightening note?

NoraChan1105 · 28 Sept 2025, 21:40 UTC

Closed
NO
NoraChan1105
Found an old bracket sample tagged pass, then discovered it had been straightened before inspection. We're reviewing fixtures for an FR5 welding proposal. How do I find out what that jig actually achieved?

20 replies

AA
AaronBarnes0523
Replying to NoraChan1105

Look for an identified measurement after release but before straightening. The accepted sample can show the required final condition, but it cannot show the untreated result on its own.

4 points
NO
NoraChan1105
Replying to AaronBarnes0523

There is an angle reading on the route card, but no indication whether the bracket was clamped. The sample tag only has the final inspection number.

12 points
AA
AaronBarnes0523
Replying to NoraChan1105

Can inspection connect that route card to the tagged sample? I would establish that before trying to explain the angle reading.

3 points
WI
WillAllen0313
Replying to NoraChan1105

I had a batch folder where the route card was for the first piece and the retained sample was from the end of the run. Both were valid records, just not a before-and-after pair. Ask whoever kept these how the sample was selected.

3 points
NO
NoraChan1105
Replying to WillAllen0313

Inspection says the tag identifies the batch, not a particular bracket. So no, Aaron, we can't connect those two. Will, that's a useful warning about the retained sample.

16 points
WI
WillAllen0313
Replying to NoraChan1105

Keep the distinction in your review. You can still use the sample to discuss the finish and final geometry without turning it into evidence of how much this jig distorted a bracket.

12 points
NO
NoraChan1105
Replying to WillAllen0313

I've separated them. The fabrication lead is looking for the old setup instruction, particularly what press gusset down meant before clamping.

21 points
BR
BrunoChan1061
Replying to NoraChan1105

Ask how long that fit-up work took as well, because the new cell estimate can lose quite a lot between those three words.

18 points
OS
OscarBaker0445
Replying to NoraChan1105

Was the gusset the same revision as the proposed part?

15 points
AA
AaronBarnes0523
Replying to OscarBaker0445

That revision check matters for the fixture too. A locating face added for an earlier gusset may have a different purpose with the current component.

7 points
NO
NoraChan1105
Replying to OscarBaker0445

Old gusset is revision B; proposed assembly uses D. B had an extended lower edge that D removes. The fixture sketch in the folder still shows a contact beneath that old edge.

13 points
WI
WillAllen0313
Replying to NoraChan1105

Give the designer both component drawings and that contact sketch. Let them establish the intended locators for D. Adding another clamp to an old picture could make an obsolete contact more effective at doing the wrong thing.

22 points
NO
NoraChan1105
Replying to WillAllen0313

Sent both. They are reviewing the current contacts before quoting the fixture. We still haven't found a released reading from before straightening, so the old correction amount is unknown.

8 points
AA
AaronBarnes0523
Replying to NoraChan1105

Will the new trial include fit-up and untouched released readings on the same identified pieces? That would answer more than another measurement of the retained sample.

19 points
NO
NoraChan1105
Replying to AaronBarnes0523

Yes. Inspection and the welding specialist are planning those stages together. They also want to assess the incoming gussets rather than assume all the gap came from the fixture.

11 points
BR
BrunoChan1061
Replying to NoraChan1105

And keep correction labour in the estimate until that trial tells you whether it is still needed.

15 points
OS
OscarBaker0445
Replying to NoraChan1105

Did removing that old contact change the proposal much?

5 points
NO
NoraChan1105
Replying to OscarBaker0445

Oscar, it hasn't been removed yet. The designer is proposing a revised locating arrangement for D, but the review is unfinished. I don't have a cost comparison to share.

16 points
NO
NoraChan1105
Replying to NoraChan1105

The revised fixture concept is back with a current-part sample plan. The old contact is omitted in the proposal, not altered on the existing jig. Thanks all; we now have a defined trial to price instead of copying the straightening note.

10 points
AA
AaronBarnes0523
Replying to NoraChan1105

Please return with the released measurements when the trial happens. I would be interested whether the incoming fit-up check changes the explanation as well.

21 points

Discussion closed

This discussion is closed to new replies after six months without activity. Last activity: .