Stamping part numbers on components for easy identification without a print change

S

sd price

#1
my materials manager wants to stamp part numbers on components to easily identify them. my mechanical engineers don't want to re-release drawings just to add engraving instructions. they would prefer to send an "advisory' notice to the supplier. I foresee all manner of problems with this approach, the least of which would be a lot of parts that do not now match their drawing. suggestions?
 
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Al Rosen

Staff member
Super Moderator
#2
sd price said:
my materials manager wants to stamp part numbers on components to easily identify them. my mechanical engineers don't want to re-release drawings just to add engraving instructions. they would prefer to send an "advisory' notice to the supplier. I foresee all manner of problems with this approach, the least of which would be a lot of parts that do not now match their drawing. suggestions?
Hi sd:
Welcome to the cove.

My first choice would be to revise the drawings to indicate the position and manner of the markings. This would minimize any confusion as to the what, where and how to mark. Otherwise, you might add the requirement to the purchase order. You might even be able to create a document that defines in general terms what, where and how the parts are to be marked and then reference it on all POs as a requirement. Of course you will have to supply this document along with the PO and drawings.
 
Last edited:
B

Bill Ryan - 2007

#3
Welcome to the Cove :bigwave:

I agree with Al's approach of revising drawings, BUT.....

Are you "design responsible"? In other words, do you supply the market with finished assemblies/subassemblies and, if not, wouldn't your customer be the "authority" as to whether you could or couldn't put part numbers on the parts? (Just questioning form a "non design responsible die cast/machine/assembler" to the automotive market)
 

Wes Bucey

Quite Involved in Discussions
#4
Since when do tails wag dogs?

The headline pretty much says it all: engineers have to be "customer-centric" - especially to their internal customer (materials manager), who says, "This is my requirement. Make it happen!"

Your instincts and the materials manager's are correct. It is important to designate where the mark should go, what size it should be, what it should look like or say, and to assure it will not affect the fit or function of the finished piece.

In practical terms:
If materials manager wants to change the manufacturing practice immediately, he can have the engineers issue temporary "redlines" (expedited changes which go through a shortened revision and approval process) with the exact details of the stamps to each affected supplier while the formal revision process proceeds at its regular pace. When the new revisions are ready (checked and approved for issue), they are issued to all concerned parties and the redlines are withdrawn.

Minimum concerned parties: manufacturing, inspection, downstream customers. Depending on the manufacturing time cycle, inspectors and downstream customers may never have to see "redline" - only the manufacturer.

Bottom line: formal document revision is necessary.
 
S

sd price

#6
thanks for the input(s). We were just certified 9001

and this was the first question out-of-the-box. Baptism by fire anyone?
 
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