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 ?
8 June 2018 - Austria-based Welser Profile Group, a producer of cold roll formed sections and tubes made of steel has acquired Ohio, US-based metals manufacturer Superior Roll Forming to expand portfolio and further diversify in the North American market, the company said.
T&H Lemont products and services are supported by a management and engineering staff with over 150 years of combined in-plant hands-on experience in the manufacture of Tube, Pipe, and Roll Forming products.
The Company is an established roll forming, custom tubing, and assembly operation with supplemental stamping capabilities.
Kong, "Flexible roll forming with staggered arranged rollers for the large curved metal plates based on numerical simulation," in Proceedings of the 11th International Conference on Numerical Methods in Industrial Forming Processes, Shenyang, China, July 2013.
Roll forming parts are frequently applied to many kinds of industry and automobile sector.
Hadley Group chief executive Stewart Towe said: "Overeem provides us with a vital link in our chain of cold roll forming manufacturing sites, which stretch from here in the West Midlands to South East Asia."
A leading solar racking company utilizing Magnelis for the first time is Mounting Systems, of West Sacramento, which is roll forming steel instead of using aluminum, according to Don Massa, the product manager for the company's Sigma Steel line.
OMCO will design, manufacture and provide technical support for a complete roll forming line including pre-punch dies, a stamping press, and a cut-off station.
India, April 15 -- India Industrial Growth Fund (IIGF), a private equity fund managed by Frontline Strategy, has invested in DTL Ancillaries (DTL), a customized roll forming company, based out of Pune, Maharashtra.
They will link three new ways of forming structural car parts--flexible roll forming (RF), laser forming (LF) and electromagnetic forming (EMF).
The Profile360 state-of-the-art, online 360[degrees] profile measurement system is said to provide full profile measurement for extrusion, drawing and roll forming processes in the rubber, plastics and roll-formed metal industries.