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Max and Min form diameter inspection

Singh

Registered
#1
How often one should check max & min form diameter on parts with splines?

Any input is very much appreciated..

Thanks guys..
 
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Jim Wynne

Staff member
Admin
#2
More information is needed. First, why are you asking? What does "form diameter" mean? What is the manufacturing process? Please answer all three questions.
 

Singh

Registered
#3
Hello Jim

Following is the answer:
1. Process is stamping
2. Max and min form diameter of splines, Form diameter is that diameter which specifies the transition point between the usable involute profile and the fillet of the tooth.
3. Needed for control plan to add frequency to check form diameters.

We currently check Annually that seems like not right.

Thanks
 

Jim Wynne

Staff member
Admin
#4
Thanks. Is your present method adequate? Have you had quality issues with the features in question? If the answer to the first question is "yes" and the second is "no," there's probably no reason to change anything.
 

leftoverture

Involved In Discussions
#5
Agreed. This decision should be based on risk. If risk is determined to be high, more frequent inspection is warranted. If risk is determined to be low, less frequent inspection is OK. When evaluating risk, look at such things as tool wear, number of setups per year, number of different machines used, variations in raw material, etc. I would think that if this is an important characteristic, it should be checked at least every time the process is setup.
 
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