Plate rolls form flat plate into cylinders, cones and arcs; three brands cover different budgets and duties. SweBend (Hassleholm, Sweden, founded 2013 by former Roundo engineers) builds PB3 three-roll double-pinch and PB4 four-roll machines with hydraulically driven rolls, parallelism held to 0.1 mm, Bluetooth control and optional SEVEN CNC, covering 1 to 250 mm plate on 500 to 8000 mm rolls. MG srl (Fossano, Italy, rolls since 1981) offers the widest catalog: G/GE/GL three-roll double pinch, PH three-roll variable geometry, M/ME/ML four-roll and Series K four-roll variable geometry, 0.5 to 300 mm thick and 200 to 8000 mm wide, with Touch Command EVO CNC. Lemas (Lien Hsine Machinery, Taiwan, since 1950) supplies value TR initial-pinch and 4TR four-roll rolls with PLC control, 3 to 10 feet and up to 5/8".
SweBend Types
PB3 3-roll double pinch (3 driven rolls); PB4 4-roll double pinch (top + bottom driven)
SweBend Range
1-250 mm plate (18 ga to 10"); roll lengths 500-8000 mm; PB3-4 (dia 100 mm) to PB3-42 (dia 1060 mm)
SweBend Examples
PB3-10-6: 2000 mm, dia 254 mm, prebend 13 / roll 18 mm, 7.5 kW; PB4-16-6: 2000 mm, dia 406 mm, 33 / 40 mm, 45 kW
MG Types
3-roll double pinch G/GE/GL; 3-roll variable geometry PH (20-300 mm); 4-roll M/ME/ML; 4-roll variable geometry Series K
MG Range
0.5-300 mm thick, 200-8000 mm wide; rated at 3x top roll dia, 260 N/mm2 yield
MG Examples
M 2020 C: 2050 mm x 20 mm (prebend 14), 7.5 kW, 5,000 kg; G 3075 Y: 3100 mm x 75 mm (55), 75 kW
MG Control
NC Nexus or CNC Touch Command EVO 4.0 / EVO 4.0 PLUS (MG Delsy)
Lemas Types
TR 3-roll initial pinch; 3-roll double pinch; 4TR 4-roll double pinch; PLC control, digital readouts
Lemas Range
3' to 10' lengths, up to 5/8" at 36,000 psi yield; e.g. 4-TR 200/10: 10' x 1/4", 7.87" rolls, ~13,400 lb
Lemas Examples
TR 80/3: 3' x 13 ga; TR 160/4: 4' x 1/4"; TR 200/4: 4' x 9/16"; 4-TR 160/5: 5' x 1/4"
