Tube Notch/Coping Flat Pattern

connor_benson

Hi all, i'm looking to design a chassis frame with lots of notch/coped tubes within it, i would then like to print out a design template based on the drawing of each tube, tape them to actual parts and use them to cut the notches acurately.

I've had a go with sheet metal function, this works in the sense that i can see the flat pattern in the sheet metal view, but you're forced to increase the thickness of the tube by at least 0.1mm and so they'll be dimensionally incorrect.

The other option i found from this forum post https://forum.onshape.com/discussion/7622/unwrapping-tube-pipe-cylinders was the feature script Sketch Wrapper, this seems to not work for one end of each tube.

Does anyone have any other experiences of doing anything similar, or any ideas of how i should move forward? 

Thanks,

Connor

konstantin_shiriazdanov

try to set K factor of the rolled sheet metal to 0 or 1, it would allow to get exact flat of one of the sheet material sides for any thickness

connor_benson

Thanks for your reply, i've had a go and it still won't allow me to set the thickness as 0. 

konstantin_shiriazdanov

I meant not the thickness of sheet material, but K factor.

michael_mcclain

I made a quick and dirty example, but I hope it get the message across for how to do this. You just set the thickness direction to the outside and a K-factor of zero with a minimal thickness and voila

https://cad.onshape.com/documents/6c41fdb4a33f3a01a8953916/w/4c5310a36b80f410c279c901/e/b611b720ac3c07e89d607596

connor_benson

Thanks guys i appreciate your help a lot, Michael is there any chance you can make the document public? I don't think i have the permissions to view it? Thanks

michael_mcclain

Yes of course, I forgot. It's public now

connor_benson

Thank you both, all sorted now! 

bill_de_la_vega

I'm trying to do the same thing. 

@michael_mcclain can your share your document again I think it's in your trash now I can't seem to open it.

michael_mcclain

@bill_de_la_vega I probably dlelete that a long time ago. I can recreate the example tomorrow and share that one