Partial Chamfer Antics

[janelson33]

Hello,

I have a circular part I am trying to use the Partial Chamfer Feature on, but perhaps it's not the most practical thing to use for my part?

So first, I click chamfer, enter my value, select the edge and then switch over to the "Partial" tab on the Chamfer Window. Now you can see that I'm thinking about selecting the point where the two arcs meet tangent with one another (see pic). This would seem like the logical spot to have a start-end constraint because that's where the chamfer blending issue is, maybe not!

However, I cannot get a chamfer preview, I cannot get the start, end or chamfer options to even act like they're changing anything. Is this shape just not something this tool was meant to be used on? Can I make work points to use to set the constraints instead?

[Anonymous]

Are you wanting to also chamfer the edge of the upper boss where it is tangent to the larger lower extrusion?  If so, you could make your chamfer by way of a revolved cut, same way it would be made on a lathe.

[WHolzwarth]

Perhaps like that?

No problem with 3D printing, but machining would be still tricky.

2016 IPT attached.

[janelson33]

That's what I've done currently, however, in an effort to reduce the time and cost involved with machining I'm considering removing it so that it can be done with an end-mill or tangential milling tool that way blending that chamfer to the lower surface is less cumbersome to our machine house. I know the outside one would still need blended in as well which is sometimes cumbersome depending on the part.

[janelson33]

Ya that's definitely an option if it were to be cast or 3D-printed no doubt; I don't think our machine shop would be to pleased about making it however. Thanks for the suggestion nonetheless. It looks like the Partial Chamfer Feature might not cut it for this part; hopefully in the future.

[johnsonshiue]

Hi! Another possibility is to reorder the features. You could create the partial chamfer before the tangent extrusion. Would it work?

Many thanks!