NX sheet metal
NX sheet metal
(OP)
Morning all,
I'm hoping someone can help me on this one. When producing sheet metal parts I dont want the flanges with a minimum bend radius to give me any additional material on the flat pattern. I can change the formula to give me this but if the part has a bend with a radius which is actually important and dimensioned on the drawing I would want the bend allowance formula to work.
In older versions of NX I used a formula which basically said if the expression of inside rad exists and is to the value of 0.01 then give me 0.01 material. If not use the traditional formula. This doesn't seem to work in new versions though.
Any thoughts appreciated.
I'm hoping someone can help me on this one. When producing sheet metal parts I dont want the flanges with a minimum bend radius to give me any additional material on the flat pattern. I can change the formula to give me this but if the part has a bend with a radius which is actually important and dimensioned on the drawing I would want the bend allowance formula to work.
In older versions of NX I used a formula which basically said if the expression of inside rad exists and is to the value of 0.01 then give me 0.01 material. If not use the traditional formula. This doesn't seem to work in new versions though.
Any thoughts appreciated.





RE: NX sheet metal
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.com/museum/
To an Engineer, the glass is twice as big as it needs to be.
RE: NX sheet metal
Thank you
RE: NX sheet metal
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.com/museum/
To an Engineer, the glass is twice as big as it needs to be.
RE: NX sheet metal
I also noticed that you can put 0 as an inside radius now? I don't think we could do that in NX4.
Regards
RE: NX sheet metal
Anyway, I hope that's clear, but give a try and see if this is what you're looking for.
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.com/museum/
To an Engineer, the glass is twice as big as it needs to be.
RE: NX sheet metal
That seems to work a treat, by putting an inside rad of 0 and 0 as the neutral factor the flat pattern is not giving the additional material.
Thank you!
RE: NX sheet metal
Designing sheet metal parts with inside radius=0 leaves you pretty miserable models and they will never resemble something you will see in real life.
Try the following and see what this brings to you; I think you might like it even better:
Make the inside radius = sheet thickness AND make the neutral factor (NF) = 0.2732
Check out for yourself; The bend radius will be within real life scale AND you will see that the flat pattern dimensions will be the result of the sum of the inside dimensions.
AND if you ever exchange 3D files with 3rd parties they will also prefer this because it will be MUCH easier to import and convert the files to sheet metal.
I hope this helps you.
Greetings,
Frank
2x NX 7.5.4.4 mp2 Mach Design
1x Solid Edge ST2
RE: NX sheet metal
I have come up with a few methods to fudge it in other software but have managed to escape having to worry to much about it in NX as we have multiCAD licenses so i just use what works at teh time. But i am keen to test out the suggestion of BR=0 and kF=0.
As Frank mentions its not as "correct" with a sharp inside radius and given a perfect world i'd love to have a R=t defaulf and get to the same pattern sizes (inside virtual sharp= bendlines). But i have yet to find a real eligant solution in other software we use heavily here. I will play with NX some more to see if i can get it to work how i want (when i get some spare time).
There was a method introduced called "Bend Allowance" and this works how one would expect.... untill you do a fold of anything other then 90 degrees. So back to the drawing board fudging for those kinds of bends! So close :P
RE: NX sheet metal
I'll keep you all updated with how I get on.