Ball and socket snap fit
Ball and socket snap fit
(OP)
I would like to know if anybody has an idea how to calculate all the parameters needed to properly design a ball and socket snap fit.
I have searched on the internet but I did not find any clear equation that explains the relation among the ball diameter, the socket diameter, the opening width and the material properties (I will use the ERTALYTE).
Thank you in advance for any proposition.
I have searched on the internet but I did not find any clear equation that explains the relation among the ball diameter, the socket diameter, the opening width and the material properties (I will use the ERTALYTE).
Thank you in advance for any proposition.






RE: Ball and socket snap fit
Dan
www.eltronresearch.com
Dan's Blog
RE: Ball and socket snap fit
You are probably going to have to figure it out for yourself through trial and error with some prototypes.
If you are machining the parts, start with it overly tight, and then you can remove material a little bit at a time until you get the fit you want.
If you are molding the parts, start with it overly loose, and then you can remove material from the tool (making the part larger) until you get it where you need to be.
I can tell you that it doesn't take much interference to get a real solid fit, usually only a couple thousandths depending on the overall scale of what you are working on.
Also, make sure you understand the tolerances of how the parts are going to be made. Again, a couple thousandths could make a big difference.
Good Luck.
RE: Ball and socket snap fit
RE: Ball and socket snap fit
RE: Ball and socket snap fit
also, ertalyte is probably too brittle to do this with if you need a small part (low max strain). iirc ertalyte is similar to delrin af which you might be able to use in its place. just make sure you calculate max strain (including tolerances).
RE: Ball and socket snap fit
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RE: Ball and socket snap fit
RE: Ball and socket snap fit
RE: Ball and socket snap fit
RE: Ball and socket snap fit
RE: Ball and socket snap fit
RE: Ball and socket snap fit
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