Inventor General Discussion

Inventor General Discussion

Reply
Active Member
kenbig
Posts: 8
Registered: ‎01-21-2013
Message 1 of 5 (721 Views)

Sheetmetal contour roll flat pattern

721 Views, 4 Replies
01-21-2013 05:25 AM

Inventor 2013-I'm working on a sheet metal cover using contour roll and I find when I dimension the flat pattern that radii that should be the same are not. Can someone tell me if my approach is fundamentally flawed? I  tried making this part out of one 220 degree contour roll and I found when dimensioning that the center points of the arcs are not symmetric as expected. I then used two contour rolls to create the part basing the second contour roll on the first contour roll sketches and I still have the same issues. Any thoughts would be appreciated. Thanks

*Expert Elite*
blair
Posts: 4,021
Registered: ‎11-13-2006
Message 2 of 5 (680 Views)

Re: Sheetmetal contour roll flat pattern

01-21-2013 08:41 AM in reply to: kenbig

You most likely need to read up on Bend Allowance Factor. This will vary according to the type of bending procedure used. The Flat-Layout length is determined by the neutral axis through the material. Not quite the center line of the product.

 

The attached spread sheet might help you out.

Did you find this reply helpful ? If so please use the Accept as Solution or Kudos button below.

IV2015 up2 PDSU / Sim Mech 2015 /
Win7-64
EVGA X79 - Classified, iCore7 3930k 32Gb Quad-Channel
950Gb (2 x 500Gb Sata III SSD RAID0 Adaptec 6805E Controller)
Nvidia GTX-690 Classified - 335.23
SpacePilot Pro 3.17.7, 6.17., 4.11
Mentor
TheCADWhisperer
Posts: 213
Registered: ‎04-16-2010
Message 3 of 5 (668 Views)

Re: Sheetmetal contour roll flat pattern

01-21-2013 09:15 AM in reply to: kenbig

Check this example.

Active Member
kenbig
Posts: 8
Registered: ‎01-21-2013
Message 4 of 5 (661 Views)

Re: Sheetmetal contour roll flat pattern

01-21-2013 09:28 AM in reply to: kenbig

thank you for you quick reply, I took a look at the spread sheet and  it looks like I have a lot to understand in order to properly apply all possible variables to my project. In the mean time while I try to figure this all out and understand the spread sheet, does it make sense that these variables create the problems in symmetry that I see in the flat pattern dimensions?

Active Member
kenbig
Posts: 8
Registered: ‎01-21-2013
Message 5 of 5 (658 Views)

Re: Sheetmetal contour roll flat pattern

01-21-2013 09:33 AM in reply to: TheCADWhisperer

thank you for you quick reply and example, your solution sure is elegant compared to my attempt. now I have to go back and see if it fits my mating part and if I can create the remaining parts to the cover in a similar fashion, thanks again.

Announcements
Are you familiar with the Autodesk Expert Elites? The Expert Elite program is made up of customers that help other customers by sharing knowledge and exemplifying an engaging style of collaboration. To learn more, please visit our Expert Elite website.
Need installation help?

Start with some of our most frequented solutions or visit the Installation and Licensing Forum to get help installing your software.