Press fit Analysis of delrin with through rod.

[brauno3]

I am trying to do some hand calculations/analysis on a 3 part assembly.

The assembly has a Thin walled steel tube with a delrin bushing press fit inside. There is then a steel rod which is placed through the bushing and the ID of the delrin is the contacting surface for rotation. Rod is fixed and the delrin rotates around it.

What I am trying to determine is the Pressure on the Delring bushing(and how much it compresses), the amount of preload and the force of friction betwen the delrin bushing ID and the steel rod.


I found a calculator(c5.13) which does some of the analysis for you.

http://www.tribology-abc.com/

However, I was wondering if anyone knew the calculations that were behind it. I thought they were called Lame's equations but I can't find much info.

Any help would be appreciated.

 

[Heckler]

Yes, Lame's equations - Hoop stress and radial pressure distribution.

Sigma-R = A + B/d^2

Sigma-T = A - B/d^2

http://www-training.llnl.gov/training/hc/5060/Design.html

Best Regards,

Heckler
Sr. Mechanical Engineer
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