Creating a fillet
Creating a fillet
(OP)
I am trying to re-create a fillet from a step model in NX that changes the radius as it moves around the edge of the feature. I've attached a power point showing before & after the fillet was added. Anybody got any ideas?





RE: Creating a fillet
What version of NX are you on?
RE: Creating a fillet
RE: Creating a fillet
RE: Creating a fillet
But that being said, are those arrows pointing to the 'Concave' or the 'Convex' blends? If you're talking about the 'Concave' blends there may be an easy way to do that using Face Blends and the 'Tangency Constraint' option for the 'Radius Method'. If we're talking about the 'Convex' blends when a simple Variable Radius Edge Blend using the 'Variable Radius Point' method should work fine.
To show you what I mean, see the attached model where the 'Concave' blends were created using the Face Blend method mentioned above whereas the 'Convex' blends were created using the Edge Blend method mentioned above.
John R. Baker, P.E.
Product 'Evangelist'
Product Engineering Software
Siemens PLM Software Inc.
Industry Sector
Cypress, CA
Siemens PLM:
UG/NX Museum:
To an Engineer, the glass is twice as big as it needs to be.
RE: Creating a fillet
RE: Creating a fillet
John R. Baker, P.E.
Product 'Evangelist'
Product Engineering Software
Siemens PLM Software Inc.
Industry Sector
Cypress, CA
Siemens PLM:
UG/NX Museum:
To an Engineer, the glass is twice as big as it needs to be.
RE: Creating a fillet
RE: Creating a fillet
But that brings up an interesting point. With NX 9.0 we've introduced a new function specifically designed to model the blends added to a pocket such as this, based on the actual tool that will be used to cut the pocket, which can be either an 'End Mill', 'T-Cutter' or 'Spherical Mill'. In this case, using a normal 'End Mill', all you need to model, before adding the new 'Blend Pocket' feature, is the rectangular limits or boundary of the pocket skipping the corner blends as the diameter of cutter will determine that size while the radius of the 'bull nose' will determine the radius of the bottom of the pocket. And using this new approach the result is exactly like what mmauldin got using the "Maintain Blend and Move Sharp Edges" overflow option when using a regular Edge Blend. So his approach probably IS the most desirable result since that one will be the easiest to manufacture (which is the whole rational behind the new NX 9.0 'Blend Pocket' function in the first place, modeling what the machine tool will produce). Anyway, good catch mmauldin.
John R. Baker, P.E.
Product 'Evangelist'
Product Engineering Software
Siemens PLM Software Inc.
Industry Sector
Cypress, CA
Siemens PLM:
UG/NX Museum:
To an Engineer, the glass is twice as big as it needs to be.
RE: Creating a fillet