I watched our fabricator press a finished gusseted bracket against the bench and call it flat, then it rocked when he let go, and apparently this is the example we are using to plan the FR10 fixture; I want a cheap way to settle what we are measuring before we buy a much more expensive way to hold it down
Our bracket sits flat only while somebody holds it down
MinaAli0250 · 2025年10月17日 00:56 UTC
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回复 MinaAli0250
Measure it released, on the supports specified for inspection. Hand pressure changes the check.
15分回复 MinaAli0250
We had a bench with a high spot that made everything look bent. I'd get inspection to check the example somewhere known first. Cheap enough to rule out.
6分Luis, yes on the bench, but please don't let a better bench turn into a proposal to clamp the finished bracket flatter, the customer gets it without that clamp
17分回复 MinaAli0250
Seen a demonstration done with one bolt nipped up through the foot. Looked excellent. Nobody mentioned the bolt until we asked to lift the bracket. Get the loose part in front of inspection before arguing about the new fixture.
9分It rocks on inspection's surface too, Luis, and Sarah they have taken it away to check the drawing supports properly, so at least I am not buying the bench a robot
8分回复 MinaAli0250
Who decides whether correction is allowed after welding?
14分回复 LiamChen1186
That needs the responsible quality and engineering people, Liam. The handover also needs to say who handles parts that fail; otherwise correction becomes somebody quietly leaning on them.
25分回复 MinaAli0250
Keep the example identified while it moves about. Ours got mixed with a corrected one on a trolley. Lost the afternoon explaining two different measurements of two different brackets.
18分回复 MinaAli0250
We priced a fixture on the assumption it would remove all straightening. Didn't happen. I'd want the quote to show the remaining correction work honestly, but I wouldn't bin a useful fixture just because it cannot do everything.
20分回复 FelixAli0197
Agreed Felix, provided someone establishes a permitted correction method and what gets checked afterwards, otherwise the supposed saving is just work disappearing from the estimate
19分回复 MinaAli0250
Why is the loose bracket not the acceptance sample in the first place?
6分Oscar, the sample was chosen because its welds looked good, which is fair for the weld discussion but somebody then called it our approved assembly; Toby, thanks, it now has its own tag and inspection photo
17分回复 MinaAli0250
Does the drawing allow that rocking, or is a measured feature actually out?
14分Good question Sarah. Rocking got us excited on another job when the important feature was the hole position. Still needed checking, but we were arguing about the wrong thing first.
10分Sarah, the foot flatness is outside the drawing requirement on this one, inspection used revision D, and the hole positions passed, so we finally have something less vague than wobbly
0分回复 MinaAli0250
That gives the fixture designer a real problem to discuss. Any other released samples available? One bad bracket tells you it happened. Wouldn't price the whole production story around just that one.
21分And keep corrected samples in a separate group. Labelled, not thrown out.
11分回复 MinaAli0250
Thanks for naming revision D, Mina. Can the fixture review use that same revision? I have seen a purchasing attachment lag behind the drawing inspection actually used.
17分Did the designer change the proposed fixture, or are you still collecting brackets? Curious whether this has altered the buying decision yet.
15分回复 FelixAli0197
Still collecting, Felix, and Ada the quote attachment was revision C so I have sent D and asked them to update it; I am not rejecting the fixture, just refusing to pretend the nice-looking sample settled it
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