W12 Series 4-Roller Plate Bending Machine

W12 Series 4 Roller Platae Bending Machine

The four-roll hydraulic plate rolling machine can complete rolling processes such as circular rolling, chasing rolling, cylindrical rolling, and arc rolling in one pass.
It is equipped with an integrated edge pre-bending function, allowing for one-time forming without secondary rolling.
The upper roll serves as the main drive roll, while the lower roll and two side rolls are fully hydraulically driven, ensuring stable operation.
Computerized displacement control guarantees a synchronization accuracy of up to ±0.2mm, achieving precise and consistent bending results.
Equipped with a PLC numerical control system and built-in overload protection device, it ensures long-term safe and reliable operation.

See all plate rolling machines, or the economical W11 3-roll plate rolling machine.

Configuration note: Controller, axes, working range, tolerances and included components must be confirmed in the signed technical quotation for the selected machine.

Working Principle Of Four Roller Machine

Initial standby: The four rollers are arranged in a diamond pattern, and the equipment enters the ready state.
Sheet clamping: The lower roller rises, clamping the sheet together with the upper roller, providing stable friction for subsequent forming.
End pre-bending: The side rollers feed and push the edge of the sheet, completing the pre-bending process and eliminating straight edge errors.
Continuous rolling: The side rollers apply continuous pressure, and with the synchronous rotation of the upper and lower rollers, the sheet is gradually rolled into a cylindrical shape.
Complete cylindrical forming: The sheet is joined end to end, and a single clamping operation completes the processing of a perfectly cylindrical shape without straight edges.

Standard Configurations

Introduction To Components

Hardened Rolls

The material is mostly 42CrMo alloy steel, which is tempered and surface hardened, and has high strength and high wear resistance. It is the main component that bears the forming load.

Drop End

After winding is complete, the bearing seat on the tipping mechanism side can rotate outward by 90°, causing the upper roller end to detach from the support and form a cantilever. The finished cylinder can then be easily pushed out along the upper roller axis without the need for hoisting or obstacle avoidance.

Throwing is prevented due to misoperation during winding through a mechanical and hydraulic double interlock. Simultaneously, a balancing device ensures stability of the upper roller in the cantilever state, preventing damage to the equipment or workpiece.

Hydraulic System

This integrated hydraulic valve station is the core power control part of plate bending rolls. Multiple solenoid valves independently control pre-bending, rolling, and discharging movements. High-strength hydraulic piping, real-time pressure gauges ensure stable working performance, reducing machine failure rate for metal sheet rolling production.

Hydraulic motor + reducer assembly

Serving as the power heart of the upper roll, this hydraulic drive assembly transforms hydraulic power from the HPU into precise rotational motion.

It drives the upper roll to feed and bend the plate continuously, while the integrated reducer amplifies torque and transmits it to the roll shaft through a rigid flange connection, ensuring stable, high-torque performance during forming.

Control Panel

Equipped with an intuitive, intelligent HMI and reliable PLC control, our 4-roll plate bending machine delivers streamlined single-operation workflows, high efficiency, and enhanced safety. It features self-compensation technology, synchronized bottom and side roll movement, and up to 8 programmable touchscreen steps. Choose from a full range of models, including cost-effective CNC solutions tailored to your needs.

Schneider Electrical Components

Schneider Electric’s genuine PLCs, circuit breakers, contactors, and other components are of superior quality, with strong vibration and interference resistance. They are suitable for heavy-duty and continuous operation of plate rolling machines, have a low failure rate over long-term operation, and effectively reduce downtime for maintenance.Schneider Electric’s genuine PLCs, circuit breakers, contactors, and other components are of superior quality, with strong vibration and interference resistance. They are suitable for heavy-duty and continuous operation of plate rolling machines, have a low failure rate over long-term operation, and effectively reduce downtime for maintenance.

W12 Series 4 Roller Bending Machine Parameter

Model	Max. Bending thickness(mm)	Pre-bending thickness(mm)	Max. Working length of rolls(mm)	Yield limit(Mpa)	Top roller diameter(mm)	Lower roller diameter(mm)	Side roller diameter(mm)	Main power(KW)
W12-4x2000	4	3.5	2050	245	160	140	120	3
W12-6x2000	6	5	2050	245	190	170	150	4
W12-8x2000	8	6.5	2050	245	210	190	170	5.5
W12-10x2000	10	8	2050	245	230	210	190	7.5
W12-12x2000	12	10	2050	245	270	250	210	11
W12-16x2000	16	13	2050	245	300	270	220	11
W12-20x2000	20	16	2050	245	330	300	240	11
W12-25x2000	25	20	2050	245	360	330	250	15
W12-30x2000	30	25	2050	245	390	360	300	18.5
W12-35x2000	35	28	2050	245	430	390	330	22
W12-40x2000	40	32	2050	245	460	420	360	30
W12-45x2000	45	36	2050	245	510	460	390	37
W12-50x2000	50	40	2050	245	550	510	420	45
W12-4x2500	4	3.5	2550	245	190	170	150	4
W12-6x2500	6	5	2550	245	210	190	170	5.5
W12-8x2500	8	6.5	2550	245	230	210	190	7.5
W12-10x2500	10	8	2550	245	270	250	210	11
W12-12x2500	12	10	2550	245	300	270	220	11
W12-16x2500	16	13	2550	245	330	300	240	11
W12-20x2500	20	16	2550	245	360	330	250	15
W12-25x2500	25	20	2550	245	390	360	300	18.5
W12-30x2500	30	25	2550	245	430	390	330	22
W12-35x2500	35	28	2550	245	460	420	360	30
W12-40x2500	40	32	2550	245	510	460	390	37
W12-45x2500	45	36	2550	245	550	510	420	45
W12-4x3000	4	3.5	3100	245	210	190	170	5.5
W12-6x3000	6	5	3100	245	230	210	190	7.5
W12-8x3000	8	6.5	3100	245	270	250	210	11
W12-10x3000	10	8	3100	245	300	270	220	11
W12-12x3000	12	10	3100	245	330	300	240	11
W12-16x3000	16	13	3100	245	360	330	250	15
W12-20x3000	20	16	3100	245	390	360	300	18.5
W12-25x3000	25	20	3100	245	430	390	330	22
W12-30x3000	30	25	3100	245	460	420	360	30
W12-35x3000	35	28	3100	245	510	460	390	37
W12-40x3000	40	32	3100	245	550	510	420	45
W12-50x3000	50	40	3100	245	610	560	480	55
W12-60x3000	60	48	3100	245	670	620	520	75

W12 Series 4-Roller Plate Bending Machine

Working Principle Of Four Roller Machine

Standard Configurations