logo
NOTICE:  This is the new PunchCAD forum. You should have received an email with your new password around August 27, 2014. If you did not, or would like it reset, simply use the Lost Password feature, and enter Answer as the security answer.
Welcome Guest! To enable all features please Login or Register.

Notification

Icon
Error
Bending ply in 2 dimensions (#4396)
Options
Go to last post Go to first unread
Previous Topic Next Topic
rolandw  
#1 Posted : Tuesday, June 19, 2012 3:57:37 PM(UTC)
rolandw

Rank: Junior Member

Joined: 5/10/2011(UTC)
Posts: 13
United Kingdom

Thanks: 1 times
I have to model some bent ply as a seat shell. Obviously thin enough ply can be bent in a number of ways but can't form a compound bend. So far I have managed to create my ply form and bend it around a path so I have the right form along the centreline of the seat shell. However I now need to curve the back and put dips for the thighs into the seat. Is there an obvious way of bending a section without introducing compound bends or calculating the sections to skin?
Back to top
rolandw  
#2 Posted : Thursday, June 21, 2012 3:06:47 PM(UTC)
rolandw

Rank: Junior Member

Joined: 5/10/2011(UTC)
Posts: 13
United Kingdom

Thanks: 1 times
I've made a mockup of what I'm trying to achieve so I've attached an image. You can see the form bent in one plane and the red lines showing what I'm try to get to. No ideas at all?
rolandw attached the following image(s):
seatback.jpg (24kb) downloaded 5 time(s).

You cannot view/download attachments. Try to login or register.
Back to top
rockyroad_us  
#3 Posted : Thursday, June 21, 2012 4:23:48 PM(UTC)
rockyroad_us

Rank: Senior Member

Joined: 9/12/2009(UTC)
Posts: 608
Man
United States
Location: In my place

Was thanked: 59 time(s) in 51 post(s)
It takes time to learn what you are trying to do. I sure can do it.
FX 7-FXPro14-1650
MacPro 11.7.4
2x2.8GHz Quad Xeon 32GB
NVIDIA 4 K5000 4GB
Work
Back to top
WWW
zumer  
#4 Posted : Thursday, June 21, 2012 5:22:20 PM(UTC)
zumer

Rank: Senior Member

Joined: 11/4/2007(UTC)
Posts: 515

Was thanked: 1 time(s) in 1 post(s)
It can't be done without compound curvature.
Back to top
lgrijalva  
#5 Posted : Thursday, June 21, 2012 5:54:55 PM(UTC)
lgrijalva

Rank: Senior Member

Joined: 6/15/2007(UTC)
Posts: 398

Thanks: 1 times
Was thanked: 4 time(s) in 4 post(s)
Assuming that the image below meet what you want approach, then you need to do a few steps:

1.- make your trace for a desired shape to make a net surface

[ATTACH]4448[/ATTACH]

2.- make net surface [ATTACH]4452[/ATTACH] and then thicken solid surface tool[ATTACH]4450[/ATTACH]

[ATTACH]4449[/ATTACH]

thats it, you can add more curves (prior to make the net surface) to your net surface for better control of your surface shape.

[ATTACH]4451[/ATTACH]

Hope this help

Luis G.
lgrijalva attached the following image(s):
chairtrace.png (33kb) downloaded 5 time(s).
chair.png (131kb) downloaded 5 time(s).
thickentool.png (27kb) downloaded 5 time(s).
extraline.png (183kb) downloaded 5 time(s).
netsuftool.png (16kb) downloaded 5 time(s).

You cannot view/download attachments. Try to login or register.
Luis G
Industrial Designer
MacOSX Ventura 13.6.4
User since Concepts Unlimited
SharkCad 14
www.miditec.com.mx
www.diferro.com
Back to top
WWW
phil  
#6 Posted : Thursday, June 21, 2012 6:33:25 PM(UTC)
phil

Rank: Senior Member

Joined: 9/5/2010(UTC)
Posts: 105
That's an awesome tutorial/steps and help from Luis on how to do it!

I think i sat on a similar type of contoured chair before and it was uncomfortable. The middle bulge will get in the way of guys' body part:) Maybe add an extra line nearer to the front edge so that more of the seating surface is flat. Also there are some of us guys with lousy posture... we can sit up straight/correctly for the first 10 minutes only. After that we start sliding forward and the bulge at the front will get in the way again. Anyways... silly me here:)
Back to top
Users browsing this topic
Guest
Forum Jump  
You cannot post new topics in this forum.
You cannot reply to topics in this forum.
You cannot delete your posts in this forum.
You cannot edit your posts in this forum.
You cannot create polls in this forum.
You cannot vote in polls in this forum.

Powered by YAF.NET 2.1.2 | YAF.NET © 2003-2024, Yet Another Forum.NET