adhesive materials in BOM?
adhesive materials in BOM?
(OP)
Hi there,
Do you include adhesive materials, like glue, thread lock, welding rod, solder, tapes, stickers etc. into BOM? If not, where should these materials go in your materials management system?
Do you include adhesive materials, like glue, thread lock, welding rod, solder, tapes, stickers etc. into BOM? If not, where should these materials go in your materials management system?





RE: adhesive materials in BOM?
RE: adhesive materials in BOM?
RE: adhesive materials in BOM?
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RE: adhesive materials in BOM?
another day in paradise, or is paradise one day closer ?
RE: adhesive materials in BOM?
Tunalover
RE: adhesive materials in BOM?
"Wildfires are dangerous, hard to control, and economically catastrophic."
Ben Loosli
RE: adhesive materials in BOM?
Tunalover
RE: adhesive materials in BOM?
I should have looked it up. I just did. Y14.34 covers how to construct a parts list among other things. Y14.38 is Abbreviations and Acronyms which was born from MIL-STD-12. That's where the abbreviation AR comes from. I'm pretty sure that if Y14.34 gives the abbreviation for AS REQUIRED that it's the same as from Y14.38.
Tunalover
RE: adhesive materials in BOM?
Chris, CSWA
SolidWorks 14
SolidWorks Legion
RE: adhesive materials in BOM?
Mike Halloran
Pembroke Pines, FL, USA
RE: adhesive materials in BOM?
B.E.
You are judged not by what you know, but by what you can do.
RE: adhesive materials in BOM?
Thanks for the correction.
berkshire also makes a good point about checking shelf life of bulk materials like adhesive or primer/paint.
One difficulty you encounter when specifying "AR" in the BOM is that many materials like adhesives/sealants/primers/paints are multiple components that require mixing and preparation before being applied. And usually there is a minimum amount of the material that must be prepared, which is often far more than is needed for a single application.
RE: adhesive materials in BOM?
This takes some of the responsibility away from the part designer for calling up these items, though they'll be required on the finished part eventually.
In these cases, there may be nothing but a little note such as "finish per PS101" to tell production that the part shall be etched, alodined, primed and painted according to a very specific set of processes.
In my current work environment, it's reduced even further, where there is only a little "X" in a box within a long list of standard practices to indicate that a process will be required. Then it's up to manufacturing to decide what consumables will be required, but no knowledge of what the designer had in mind.
STF
RE: adhesive materials in BOM?
In all but the tiniest outfits, the supply chain staff has absolutely no idea what you make or how you make it.
The product design engineer(s) and the manufacturing engineer(s), working together, are the only people who can make a reasonable guess about appropriate order and issue units and quantities.
If you can't be bothered to do a little math to get the BOM exactly right, then you deserve to have your phone ringing all the time with silly fire drills about BOM issues. ... and you will.
Mike Halloran
Pembroke Pines, FL, USA
RE: adhesive materials in BOM?
For example, before prime and paint, one needs to clean and degrease. I've never seen any drawing telling manufacturing how many gallons of water, cleanser, or degreaser they will need for a part, nor lint-free rags to to wipe it down. And, as has been mentioned, there are times when the prep for consumables is a noticeable portion of the material required. Sometimes there are problems as simple as minimum order quantity; estimating complains the .03gms of material should cost $X, but the factory is spending $1000X, because the minimum qty for making one part is 1000 times the required qty.
And even this varies - a lot - when running a single part or running 100 or 1,000,000.
There is also loss. I see this from time to time. An assembly drawing calls out 100 fasteners, so procurement orders 100 fasteners, and the assembler drops one and can't find it. So the entire assembly process is halted for a few days to order a replacement. My favorite is polysulfide rubber sealant. The shop always wanted the 30 minute cure and then whined about how much they wasted because it set so fast. And, if moved to the 24 hour version, would whine the parts were still wet hours after assembly.
Some see the engineering drawing as the basis for all work, but in fact it is a final inspection document, not a process planning document.
RE: adhesive materials in BOM?
Tunalover
RE: adhesive materials in BOM?
While we have discussed the situation regarding bulk materials and the manufacturing process, there is also the issue of how bulk materials are handled when it comes to cost accounting. Consider the problem created when you have an inventory of a particular bulk material that is used for more than one contract. How do you account for the cost of material used for each contract?
RE: adhesive materials in BOM?
RE: adhesive materials in BOM?
Another problem I would point out with bulk materials is the waste produced from cutting pre-preg composite materials. These materials are usually quite expensive, and there is often very significant amounts of scrap material produced when the pieces are cut from the roll stock. The material can easily cost $50/lb, and when the estimates are made for materials required to manufacture these parts the scrap rate is often 100% of the material required for producing the part.
RE: adhesive materials in BOM?
Your comment about waste from Pre-Preg stock, Is the bane of most composite fabrication facilities.
They attempt to mitigate this, where possible, by using nesting programs on CNC cutters , or having patterns for small parts when hand cutting. This is one of the areas where kitters who can unroll cut and refreeze stock in one operation shine.
B.E.
You are judged not by what you know, but by what you can do.
RE: adhesive materials in BOM?
Adhesives, lubes, tapes, stickers... get put into the drawing parts list. Things like adhesive & lube I've always seen AR, tape I sometimes see a qty given and stickers I typically see qty.
For whatever reason(s) places/systems I've worked generally don't put weld rod, solder, paint or similar on the parts list.
However, I'm not sure you're talking about drawing parts list but rather BOM in your materials management program which is a slightly different kettle of fish.
Typically I've seen these kinds of items treated as some kind of 'floor stock' or 'free stock' with some sort of 'reorder point' level. My current employer actually outsources this, bascially a hardware supply company comes in a few times a week to check what's getting low and replenishes it. Not saying this is the panacea just what I've seen.
What is Engineering anyway: FAQ1088-1484: In layman terms, what is "engineering"?
RE: adhesive materials in BOM?
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The Help for this program was created in Windows Help format, which depends on a feature that isn't included in this version of Windows.
RE: adhesive materials in BOM?
When someone cares about it, and it's put on a drawing, and is included with the product, it's indeed part of the bill of materials.
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RE: adhesive materials in BOM?