Extrude cut problem

[s_pme20]

Can some 1 explain , why last cut is not possible in attached file part?..this is example only..but I have similar real situation.
It says: 'cut do not intersect part'..but i dont think so..

Resume last extrude cut..in part:

2011-09-20_120041_example.prt.1.zip

 

[telecomguy]

It appears to be an issue because you have a singularity where the side of the cut is aligned to the v-cut. I broke the alignment and nudged the cut over just a small amount and it regenerates. <tg>

 

[roblom]

Change the order in


Extrude 1


Extrude 3


Extrude 2


Then it works. The problem is that the extrude cut 3 is to close to the point of extrude 2.


But lets get real, how do you want to make this? It became 2 parts and the sharp edge with radius 0 is also a bit hard to produce.
Edited by: roblom

 

[s_pme20]

its a single part only...I have to give fillet afterwards with some radius...
this is just example i have created to show...real part is totally different..

Any how I managed it to get same result...
but I wonder y it doesnt cut through V-centre line...it has material to cut on rest of part..

 

[kdem]

Examining the model by highlighting items of the geometry might explain why ProE is having trouble. When you create Extrude 2 the way its defined in your file some of the edges that are part of Extrude 1 are converted to Extrude 2 edges. If you change the geometry of Extrude 1 or Extrude 2 so that the bottom surfaces are not co-planar the issue doesn't occur.

 

[s_pme20]

hmm....looks like bug...if i tilt any surface it works.like below:

View attachment 5377

 

[kdem]

I would go so far to say it's a bug but bad geometry. As I've often been reminded just because you can create the geometry in CAD doesn't mean it's advisable, good geometry, or realistic from a manufacturing standpoint.

 

[roblom]

I would go so far to say it's a bug but bad geometry. As I've often been reminded just because you can create the geometry in CAD doesn't mean it's advisable, good geometry, or realistic from a manufacturing standpoint.

That's my point of view also.


That it works when you tilt is because than the 2 surfaces are not aligned and therefore pro/e does not try to merge it with the cut.

 

[Bell]

Posts on extrude:

http://proedesignstudy.blogspot.com/

Thanks

 

[s_pme20]

ohh..that really opened my eyes...

wide open..

 

[Pupp1286]

If you change side 2 to cut as well, it'll work. For whatever reason.