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Tweak the tab/slot arrangement

PostPosted: Tue Dec 16, 2014 4:05 pm
by schoey
I'm thinking there are two main issues with the current setup, firstly the stress concentration at either end of the slot and in the tab, secondly the tight tolerance this set up forces you to. An easy fix for both would be some re-tooling on the dies for some small radii:

Image

I think they would just about eliminate any breakage as the cracks are much less likely to start in this scenario, they'd also allow for some slight movement making set up much more forgiving. The slots would have to be moved outward slightly of course to match the wider 'neck' between the two tabs, as shown would give 1mm side-to-side movement, a wider slot could allow for more.