Can't Blend

[REDesigner09]

Hi,

I'm trying to put a .015 blend on a linked body that has concave & convex surface. Previously, I had no problems, but I had to modify the Linked Body a little bit. Now, for some unknown reason, I can't apply my .015 blend.

What could be the cause & more importantly, how can I fix?

Thanks

 

[jerry1423]

What is your modeling tolerance?
with only a .015 blend the tolerance should be quite small

 

[REDesigner09]

Hi,

Right now, my modeling preference & blend tolerance are set at .001. Should one or both of these be modified? If so, which one?

Thanks

 

[cowski]

Are you able to apply a smaller blend?
Sometimes if you apply a smaller blend and 'sneak up' on the value you really want you can see where things are going wrong.

Depending on the situation, a face blend sometimes works where an edge blend fails.

Can you post a section of the model or a .jpg?

 

[jerry1423]

btw, what version of NX are you on?

.001 tolerance should be OK

 

[REDesigner09]

Hi,

I'm using NX 7.5. I have a sketch, which made a tool to subtract into my main part body. I had no problem subtracting, but I can get 1 or 2 out of the 12 features - like a race track, to blend on the concave or convex side.


This should be a simple feature to use, as it previously was on the same part, but now being a pain...

The .001 tolerance doesn't seem to be working or doesn't seem to have an effect.

Any other suggestions?

 

[JohnRBaker]

If you could upload the model, or at least a chunk of it, which would demonstrate where and what problems you're seeing.

John R. Baker, P.E.
Product 'Evangelist'
Product Design Solutions
Siemens PLM Software Inc.
Industry Sector
Cypress, CA

http://www.siemens.com/plm

http://www.plmworld.org/museum/

To an Engineer, the glass is twice as big as it needs to be.

 

[REDesigner09]

Hi,

Hopefully this file will upload properly. I'm actually having a lot of issues with this whole model, but here are the primary issues.

In Eng-Tips_Blend_Issue.prt, I cannot apply a .015" radius blend on the concave & convex very well. Previously, I had no problems in the same in area.

In the, Eng-Tips_Transition_BC.prt, I'm having difficulties transitioning. My first intent, as with the core body in Eng-Tips_Transition_BC.prt, was to create a bunch of cross-sections, then use the Through Curve feature to connect it all.

I've discovered that splines are quite difficult to work with if I need to tweak my profiles.

Assistance with both issues would be greatly appreciated, but assistance with one would be great to. I added some pics to.

Thanks Everyone....

 

[REDesigner09]

Hi Everyone,

I forgot to mention that, Eng-Tips_Transition_BC.prt is a sub-component of Eng-Tips_Blend_Issue.prt, but I'm sure you experts would've figured this out.

Thanks

 

[JohnRBaker]

What did you upload as I can't open it and I get no warning or anything, just a null response? If these are NX part files, perhaps if you zipped them it would help.

John R. Baker, P.E.
Product 'Evangelist'
Product Design Solutions
Siemens PLM Software Inc.
Industry Sector
Cypress, CA

http://www.siemens.com/plm

http://www.plmworld.org/museum/

To an Engineer, the glass is twice as big as it needs to be.

 

[REDesigner09]

Hi John,

I uploaded a 'zip' file called, Eng-Tips_NX 7.5 Blend & Transition_Help.zip.

In it, you will find:

1) Eng-Tips_Blend_Issue.prt
2) Eng-Tips_Transition_BC.prt (Child Component)
3)Transition_Pic_1.jpg
4) Transition_Pic_2.jpg
5) Transition_Pic_3.jpg
6) Transition_Pic_5.jpg

The file is approximately 15 KB's. I re-uploaded it to see if it will submit. It appears that the zip file has uploaded successfully.

The NX files are in 7.5.

 

[cowski]

The "&" in your file name appears to be messing things up. When I try to download the file it attempts to retrieve "Eng-Tips_NX_7.5_Blend_" and the rest of the filename is cut off.

 

[cowski]

Also, is there any chance of a parasolid that I can import into NX6? We haven't updated to the latest release yet.

 

[REDesigner09]

Hi,

I renamed Eng-Tips_NX 7.5 Blend & Transition_Help.zip to
Eng-Tips_NX_Blend_and_Transition_Help.zip & uploaded it.

As requested, I included a parasolid for the blend & transition issue.


Hopefully, you'll be able to open.

 

[JohnRBaker]

So exactly where on the model(s) are attempting to add the blends?

John R. Baker, P.E.
Product 'Evangelist'
Product Design Solutions
Siemens PLM Software Inc.
Industry Sector
Cypress, CA

http://www.siemens.com/plm

http://www.plmworld.org/museum/

To an Engineer, the glass is twice as big as it needs to be.

 

[REDesigner09]

Hi John & Others,

In the Eng-Tips_Blend_Issue.prt file, I'm trying to add .015" blends on the concave & convex features in the upper-center of the part - called a core.

The clockwise or counter-clockwise types of features.


In the Eng-Tips_Transition_BC.prt, I'm trying to get a "cleaner & parametric" transitions of the Leading (Leftside or the side that is fairly straight, then transitions & twists to the core body. On the Trailing edge (Rightside) of the core, it's a more difficult transition.

My current features give me something close to what I want, but not close enough.

Thanks again....

 

[JohnRBaker]

I'm going to have to look at this over the long weekend. Maybe by Monday I'll have something to send back.

John R. Baker, P.E.
Product 'Evangelist'
Product Design Solutions
Siemens PLM Software Inc.
Industry Sector
Cypress, CA

http://www.siemens.com/plm

http://www.plmworld.org/museum/

To an Engineer, the glass is twice as big as it needs to be.

 

[REDesigner09]

Hi John & Others,

Thanks again for the asssistance.

 

[REDesigner09]

Hi John & Others,

If you happen to be looking at my, "Eng-Tips_Transition_BC.prt file, you will see that I have a bunch of sketch profiles. Originally, my design intent was to make a handful of cross-sections, then use the through-curve feature to define the solid (airfoil-core profile, twists & transitions.

As you will also see, I have a handful of airfoil-core sketch profiles that are partially constrained with splines. Getting the profile wasn't too difficult, but if I had to tweak the leading & trailing edges of these sketch profiles, the sketch became very difficult to work with, even to move it a couple of thousandths. Perhaps, you have a better suggestion to constrain & maintain desired profiles.

When using the Through Curve feature, there are areas that does not form well & becomes distorted or funking looking, which is not my design intent. If I had 5 cross-sections, the first 4 would develop fine, then for whatever reasons, the 5th would distort my whole solid feature.

What would be the cause of this?

Thanks again everyone....

 

[REDesigner09]

Hi Everyone,

I forgot to mention - Happy T-Day.....