From Mike Menning, February
3, 2004
Below is a list of
considerations which need to be addressed prior to releasing the drawings for
the dual-cone flexure design . There are likely other considerations but these
are the ones that come to mind at present. My expectation is that Mike Foss will
provide details of the drawings as they mature and that Erik will be
responsible for supplying the analysis to John for his review and
approval.
1. Determine needed fastener
torque to provide required clamping force considering the need to exceed the running
torque of the locking feature and any reduction in clamping force due to
friction.
2. Determine torque level
for installing stud into Keen-Sert considering the running torque in the
locking feature and the need for the installation torque on stud to exceed the
installation torque on fastener ( to prevent stud and cone rotation during
fastener torquing).
3. Determine if small hex
feature on outer end of stud can withstand the max installation torque.
4. Determine stresses in
eccentric cones, grid bushing, and flexure walls due to installation torues of
stud into Keen-sert and fastener onto stud.
5. Ensure that inner cone
remains proud relative to outer cone when loadind with clamping force in worst
case.
6. Make recommendations for
surface finnish and coating for eccentric cones and mating surface of flexure.