Parksons Engineering Corporation

Typical Applications

Three-roll hydraulic plate bending for forming cylinders, shells, and curved sections in heavy engineering fabrication.
Roll bending of boiler shells, tanks, ducts, and pressure components in cement and power plants.
Precision rolling of cylindrical shells for defence, shipbuilding, and pressure vessel fabrication.
Suited for routine fabrication thicknesses commonly encountered in power plants, cement plants, steel structures, and EPC workshops.
These machines are typically used for shopfloor rolling of medium to heavy MS plates, where uniform curvature is required.

• Three-roll hydraulic plate bending machine with pre-pinching (pre-bending) capability to reduce flat ends on rolled shells.
• Hydraulic bottom roll movement with individual planetary gearboxes ensures smooth and controlled rolling of MS plates.
• Hydraulically operated drop-end allows easy removal of closed shells after rolling.
• Rolls are manufactured with built-in crowning to compensate for deflection and maintain uniform curvature across the plate width.
• Rigid fabricated frame with alloy steel rolls provides consistent bending accuracy under shop-floor conditions.
• Optional top roll drive is available for thin plates and short shells to prevent slippage and surface marking.

Model	PBM-12 × 1500	PBM-16 × 2000	PBM-18 × 2500	PBM-22 × 2500
Pre-Bending Thickness	8 mm	12 mm	12 mm	15 mm
Rolling Thickness	12 mm	16 mm	18 mm	22 mm
Max Plate Width	1500 mm	2000 mm	2500 mm	2500 mm
Top Roll Diameter	230 mm	275 mm	325 mm	360 mm
Bottom Roll Diameter	210 mm	250 mm	290 mm	325 mm
Min. Rolled Shell Diameter (approx.)	~700 mm	~825 mm	~975 mm	~1080 mm
Main Motor Power	5.5 kW	11 kW	15 kW	22.5 kW

Three-roll pre-pinch plate bending machines are selected where reduced flat ends, consistent shell geometry, and controlled curvature are required.
Higher plate widths, higher thickness capacities, and PLC-controlled configurations are available on request.

• Capacities are rated based on steel with Ultimate Tensile Strength (UTS) of 42 kg/mm².
• Remaining straight length after pre-bending is typically 2.5 to 3 times plate thickness, depending on material grade and setup.
• Conventional pyramid-type plate rolling machines (without pre-pinch) are also available for cost-sensitive or maintenance-oriented applications where flat-end control is not critical.
• Machine selection should be based on plate thickness, width, minimum shell diameter, material grade, and fabrication duty cycle — not rolling thickness alone.