Frequency fo CMM Inspection - Sub Contract Machining of Forgings

W

watto1708

#1
I am currently arranging for proof machining of forgings to be sub-contracted out. The sub contractor has CMM capability and I am now trying to establish frequency of CMM inspection. There is no stipulation from our end customer with regards to inspection frequency.

What is a realistic inpection frquency to request from sub-contractor?:notme:
 
Elsmar Forum Sponsor
#2
Re: Sub Contract Machining

I am currently arranging for proof machining of forgings to be sub-contracted out. The sub contractor has CMM capability and I am now trying to establish frequency of CMM inspection. There is no stipulation from our end customer with regards to inspection frequency.

What is a realistic inspection frequency to request from sub-contractor?:notme:
"Realistic' is going to depend on a couple of things:

Criticality of the dimensions/feature on the part, and

Suppliers process capability to hold the dimension/feature.

Anything else is going to be a '****-shoot' I think the expression is...
 
W

watto1708

#3
Re: Sub Contract Machining

It is only proof maching so dimensions not critical. ±1.0 on all dimensions. Sub contractor process capability is good (once job is set up there is no variation in process).
 

Jim Wynne

Staff member
Admin
#4
Re: Sub Contract Machining

It is only proof maching so dimensions not critical. ±1.0 on all dimensions. Sub contractor process capability is good (once job is set up there is no variation in process).
If you're confident in this assertion, there should be no need for inspection at all.
 
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