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ptc-65996181-Visitor
1-Visitor
October 18, 2014
Question

Fillet Problem

  • October 18, 2014
  • 3 replies
  • 1976 views

I have casting component, IN the edge on circular area there two joining fillets r3 that cylinder supports with main body with an rib, here we can create the fillet but the out put is not good an divided edge is formed during filleting as shown in the image.

 

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3 replies

T
TomD.inPDX17-Peridot
17-Peridot
October 18, 2014

Sometimes you have to sneak up on the right solution. Sometimes there is an alternate solution you can choose.

If you want the same termination on the rib as the one on the right, I suggest putting that in 1st and adding the round on the tube afterward.

Obviously there will be some level of transition, but the order of creation will help determine the junction.

D
dgschaefer21-Topaz II
21-Topaz II
October 18, 2014

I don't use multiple round sets in one feature unless I need it. I find multiple round features gives me a little more flexibility.

I'd use 3 features for this area. I'd round the end of the cylinder first, then the edges of teh rib and lastly the joint between the rib & cylinder. I think that will give you good results.

T
TomD.inPDX17-Peridot
17-Peridot
October 19, 2014

You know, there is nothing like actually trying it to get you all the little details of what can go wrong... or at least, what must be accounted for.

In general, a file would take care of this, but alas, we do not (yet) have a "file feature".

The problem is in a round being tangent to a round and interrupted. I went through a manual process of getting the strong rib and still merging a tangent round to the cylindrical surface. This can be done but not directly with the round feature as it always want to step the round on the cylinder end.

Have a look at the attached file to see how this is made (Creo 2.0 M040 full version).

casting_merge_rounds.PNG

If you switch this to analysis surface, you can see how this merged. For a casting, this is more than sufficient.

casting_merge_rounds_closeup.PNG

However, a variable round can merge the end if it finishes at the same radius as the end of the cylinder.

(See prt0524a.prt).

casting_merge_rounds_variable.PNG

When these details are critical, this requires some comprehensive crafting geometry in Creo.

Patriot_1776
Patriot_177622-Sapphire II
22-Sapphire II
October 20, 2014

Ahhh, rounds, what fun! Especially when several converge at the same point. Transition mode can help.

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