×
INTELLIGENT WORK FORUMS
FOR ENGINEERING PROFESSIONALS

Log In

Come Join Us!

Are you an
Engineering professional?
Join Eng-Tips Forums!
  • Talk With Other Members
  • Be Notified Of Responses
    To Your Posts
  • Keyword Search
  • One-Click Access To Your
    Favorite Forums
  • Automated Signatures
    On Your Posts
  • Best Of All, It's Free!
  • Students Click Here

*Eng-Tips's functionality depends on members receiving e-mail. By joining you are opting in to receive e-mail.

Posting Guidelines

Promoting, selling, recruiting, coursework and thesis posting is forbidden.

Students Click Here

Jobs

Force required to bend 5" plate x 10' wide

Force required to bend 5" plate x 10' wide

Force required to bend 5" plate x 10' wide

(OP)
I want to cold roll a cylinder (on a pyramid plate bending rolls):

Plate thckness: 5"
Plate width: 10'0"
Material: Mild Steel
Diameter of cylinder to be rolled: 13'0"

The machine I intend to use is capable (according to the manual) of 3" thickness over 12'0"  However, the build of the machine suggest that it should do considerably more.

Can anyone help  ?

The machine is mechanical driven bottom rolls (rolling) 190HP. Pinch of the bottom rolls is mechanical 75 HP each.

All rolls are 800mm dia.

Working time is not a consideration as long as we can do the job.

Appreciate any advise.

Peter Quigley

RE: Force required to bend 5" plate x 10' wide

There is an excellent reference document that pertains to cold forming of steel plates. The source of this information is from Bethlehem Lukens. The equation for determining press load for roll forming is as follows;

 P = (0.833 * U * t^2 * L)/W

where U = ultimate tensile strength Ksi
t = plate thickness (in)
L = length of plate to bend (inches)
W = width of die opening (inches)

This document can be obtained from the web site below;

http://www.intlsteel.com/content/products/prod_plate_lit.aspx


RE: Force required to bend 5" plate x 10' wide

I'm not certain where the 0.833*U comes from in that equation.  But note particularly, that if you decrease the length to 5/6 of the original value, and increase the thickness to 5/3 of the original value, the required force goes up by a factor of 2.3.

Red Flag This Post

Please let us know here why this post is inappropriate. Reasons such as off-topic, duplicates, flames, illegal, vulgar, or students posting their homework.

Red Flag Submitted

Thank you for helping keep Eng-Tips Forums free from inappropriate posts.
The Eng-Tips staff will check this out and take appropriate action.

Reply To This Thread

Posting in the Eng-Tips forums is a member-only feature.

Click Here to join Eng-Tips and talk with other members!


Resources