Cannot Fillet Properly

[Adrian2]

Dear Folks;

I am preparing a pump impeller model with vanes which follow an involute curve and the impeller body which is a revolved solid. I tried to fillet the area where the vanes meet the body but SW2001 cannot do it. I tried a face fillet but that also was unsuccesful.

Can anyone give me some pointers about filleting objects that come together at weird and wonderful angles.

Regards

Adrian

 

[SBaugh]

Did you try a Varaialbe fillet? Scott Baugh, CSWP
credence69@REMOVEhotmail.com

http://www.3dmca.com

http://home.insightbb.com/~scott.baugh/

*When in doubt always check the help*

 

[macPT]

My experience is that ading fillets to an almost finished part can be very tricky and sometimes frustrating (even with other cad systems). The results can vary a lot if you change the type of fillet, the radius, the corners selection, the order by wich you molded your features and even if you have included, or not, the filet in the scketch. I've never figured out the rules to do proper fillets, excepte this one: you should avoid complex surfaces on the sorroundig of the fillet. Some times it is very usefull start with small radius and see the model behaviour selecting biger and biger values (some times to realise that, in fact, we were demanding some impossible geometry)

One question: pump impellers, involutes, ... sounds like complex geometry - did you try to use surfaces? I think that for this cases, working with surfaces leads to better modeling results.

 

[macPT]

I forgot to mention that SBaugh is right. You should also test variable radius fillet (but remember: if it fails, try smaller redius first).