Roll Forming

(redirected from Rollforming)

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 ?
Eastside Rollforming Specialties Inc, 82855 Florence Ave.
They are a very customer oriented company that manufacturers controls that operate rollforming machines.
International Resource News-July 8, 2011--Custom Rollforming Corp.
FrameCAD Solutions has launched its new FL650 Floor Rollforming Line, which is used in the production of optimised engineered fast track flooring systems.
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.
At the Dahlstrom Industries division of rollforming equipment producer Formtek, Inc.
Cold rollforming, a metal deformation process, offers many benefits to manufacturers and job-shops and is gaining wider use where greater productivity and handling more diverse workpiece metallurgy are required.
Founded in 1959, Bradbury now has a product line covering gauge ranges up to 1" (25mm) that includes rollforming equipment, levelers, coil processing lines and automated production systems.