Feeling complicated with this small model... pls help

[sk258013]

Here i have attached two files one is image which i wanted to do model, and other is CATPart which i have tried

there is sheet of size 250*250mm and there are two 90 Degree bends both on same side of size 100mm, as you can see in CATPart file i have created, but when you measure the distance between center of bend to edge of wall its slightly reduced, not only that all dimensions are reduced when you measure it from bend center, How can i achieve this??


Pls Help me..


Note :The dimension are measured by center of bend as you can see in image

 

[CAD2015]

I can't open your attachment.......Can you attach the Catia files?

USSagittarius

 

[itsmyjob]

you picked the wrong option to design your part.

If you want to dimension the part from the bend, you have to build it from the bend line: use the "bend from flat" option with a line in a sketch at 100mm from the edge (just like your drawing).

(I changed my post since the reply bellow)

Eric N.
indocti discant et ament meminisse periti ​

 

[JeniaL]

itsmyjob right. when you unfold you will get 99.9 instead of 100. play with a k-factor to get 100.

 

[drewmumaw]

@JeniaL
I think the k-factor has to be 0.5 for the part to be the same length folded/unfolded.

Drew Mumaw

http://www.textsketcher.com

http://www.drewmumaw.com

 

[JeniaL]

nope. should not be 0.5. may be in a books it's 0,5 but not in real life.

 

[sk258013]

Hi all

As itsmyjob told i tried by bend from flat command but still there is difference in dimension and even i tried to very k factor from 0.1-0.9 but no result

can anyone model it and upload?

Here is what i tried by bend from flat

 

[JeniaL]

note that there are a lot of options in bend from flat. use iml and proper k-factor to get desired result.
change k-factor in sheet metal parameters not in operation.
this reminds me b757 program i worked on awhile ago. FD and dimensions from edge to axis line thats all. well got no UR's from the customer.

you have to play with options. if you use btl then you get 100mm flange but if you unfold your part dimension will be like 97mm or so.
figure out what takes precedence 3d or FD.

 

[sk258013]

Okay fine i got it

thanks