Roll Forming

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roll forming

[′rōl ‚fȯrm·iŋ]
(metallurgy)
Metal forming by using contoured rolls.

Roll Forming

 

the process in which a pressing tool is used to form hollow, symmetrical parts from sheet or preformed billets. The pressing tool advances from the center of the billet outward, the latter being mounted in a rotating mandrel. The area of local plastic deformation occurs as a helical line on the surface of the billet. The configuration of the mandrel corresponds to the shape of the finished part.

The pressure tools used in roll forming include forming bars and forming rollers and rolls of various shapes, which are set into rotation by the rotating billet. Small parts are roll formed in universal horizontal or vertical lathes. Roll forming is widely used to make bottoms for containers that are over 3 m in diameter, for example, large cisterns, tanks, and kettles. The method is suitable because roll-forming tools require much less force than those used in other processes, such as stamping.

For cold-working steel and nonferrous bottoms up to 4 m in diameter and 25 mm thick, specialized roll-forming lathes are used; for steel bottoms up to 7 m in diameter and 165 mm thick hot working with these specialized lathes is used, which involves several operations with intermediate reheating of the billet.

References in periodicals archive ?
UK-based Hadley Group, a leading producer of cold rolled steel sections and allied products, is set to showcase its expertise in custom rollforming and structural/non-structural products at the upcoming Big 5 construction expo in Dubai.
(Images: [c] WorldAutoSteel) FSV BEV Steel Types as % of Body Structure Mass DP 500,600 11.8% DP 800 9.5% DP 1000 10% TRIP 980 9.5% TWIP 980 2.3% CP 1000-1470 9.3% MS 1200 1.3% HF 1500 11.1% Mild Steels 2.6% HSLA 450, BH 340,400 32.7% FSV BEV Manufacturing Processes As % of Body Structure Mass Stamping 41% Closed Rollforming 7% Hot Stamping 3% Hot Stamping 3% Hot Stamping--Laser Welded Blanks 9% Open Rollforming 2% Stamping--Laser Welded Blanks 38% Note: Table made from pie chart.
Eastside Rollforming Specialties Inc, 82855 Florence Ave.
The midstream and downstream sectors, meanwhile, cover the production of flat products (hot rolling, cold rolling, tinplating, galvanizing, prepainting, rollforming) and long products (such as bar mills, rod mills, nails, wires, structural mills).
The prediction of deformation length in cold rollforming. Journal of mechanical working technology, 9(2): 181-191.
They are a very customer oriented company that manufacturers controls that operate rollforming machines.
International Resource News-July 8, 2011--Custom Rollforming Corp.
Stourbridge-based roll-form specialist Formit has completed the installation of two rollforming lines at a factory belonging to the UK's leading manufacturer of garage doors.
The award-winning paper is titled "Vehicle Side Structure Concept using Ultra High Strength Steel Sheet and Rollforming Technology" (SAE Paper No.
T&H Lemont is a leading supplier of form and weld mills for tube and pipe, rollforming mills, toll tooling and related technology.
Find out if rollforming is the answer to your product design requirements by calling: Roll Formed Specialty, (888) 677-9752 Fax: (416) 321-8420 www.rollformed.com
At the Dahlstrom Industries division of rollforming equipment producer Formtek, Inc., David Voth joins as project manager.