Roll forming machine application

Roll forming machine was applied in large quantities of parts with constant complex cross-sectional shapes. Parts often are of long length. As with extrusions, however, short parts can be made by cutting the formed strip to certain length.

Sheet thickness can be 0.13 mm to 25 mm was processed. However, except for heavy-wall welded steel pipe and structural members made by this process, normal commercial limits are 0.25 to 4 mm Processible widths range from 25 mm to 21/2 m (1 to 100 in). however, 1 m(40 in) is a common commercial maximum, and 400 mm (16 in) is the thinest processible on the most commonly available roll forming machines. Deep forms are difficult; 100 mm (4 in)is a practical depth limit for easily made cross-sectional shapes.

Roll Forming Machine Process

Roll forming Machine components have many applications, especially when mass production is involved. In the building industry, components manufactured by this process include roof and siding panels, purlins, joists and studs, window frames, door-trim ridge rolls, downspouts, architectural trim, and copper electrical conductors.

Appliance parts made by roll forming include panels for stoves, refrigerators, and other appliances, particularly when wraparound forms are involved, refrigerator shelves, and lighting-fixture parts. Curtain rods and tracks for sliding doors and draperies, drawer handles, and metal picture-frame members are also made by roll forming. When curling (longitudinal-bending) equipment is included in the roll forming line, such parts as bicycle fenders and wheels, quonset-hut frames and roofing, barrel hoops, drum rings, and bezels are formed.

Roll forming can be carried out with planted, galvanized, lithographed, vinyl-coated, and painted stock (if the paint is baked and the roll forming is not too severe or if a bendable-paint formulation is used ). Dual-layered components also can be made at one time. These may include bimetallic parts such as those made when a thin stain-less-steel facing sheet and a carbon steel support sheet are roll forming together or when fiber, paper, asbestos, or rubber inserts are places in a metallic form.

Long pieces such as railroad-car and truck-trailer trim members can be made with this roll forming process. The maximum length of parts is dictated only by application requirements and handling conditions. Figure illustrates some typical cross sections that can be produced by this roll forming process.