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Engineered specifically for delicate materials that demand superior surface finish. Hydraulic pressure-balanced system prevents workpiece marring; optimized rolling geometry enables production of complete tubular sections or variable-radius partial tubes on single machine.
Upper main roll, two lower support rolls, and side pinch roll each feature independent SAI hydraulic motor + proportional valve. Flow divider valve automatically maintains load balance; eliminates side-load stress that typically causes surface indentation on soft materials.
Pilot-operated check valve on upper roller bearing prevents gravitational sag during idle periods. Dual-speed system (high-speed 6 m/min feed + precision 1.5 m/min rolling) maximizes efficiency while maintaining surface quality.
Optimized for aluminum alloys (5000, 6000 series), stainless steel (304, 316L), and specialty alloys. Reduced rolling forces compared to 3-roll systems prevent material strain hardening; enables production of work-hardened sections without annealing.
Both pinch (clamping) and side guide rollers actuated via proportional hydraulic cylinders. Enables infinitely variable geometry adjustment without mechanical screw-down complexity—critical for rapid batch changeovers between different tube diameters/radii.
Real-time digital output monitoring displays all four working roll positions simultaneously. Automatic overload protection prevents equipment damage; operator gains instant visual feedback of each roll position via HMI—essential for catching material jamming before damage occurs.
Unique design feature for thin-plate specialization. Upper main roller equipped with pilot-operated check valve that maintains minimum pilot pressure (10 bar) even during idle periods. Prevents gravitational sag that would cause surface indentation on soft aluminum/stainless surfaces.
Aluminum Processing Benefit: Preserves strain-hardened surface finish (Ra <0.8μm achievable) | Enables production of cold-worked sections without annealing requirement | Superior cosmetic quality for visible application products (HVAC ducts, architectural profiles)
Each roll (upper, two lower, side) independently driven by dedicated SAI hydraulic motor. This contrasts with mechanical cross-shaft systems that create uneven load distribution—problematic for soft materials prone to buckling.
Synchronization Precision: Flow Divider Valve maintains ±5% flow balance | Torque Monitoring via proportional valve adjusts flow per load feedback | Sync Accuracy: <±1% torque variance under full load
Variable displacement pump with load-sensing compensator enables two distinct operating modes: high-speed transport (6 m/min) for rapid material feed, and precision rolling speed (1.5 m/min) for final diameter control and surface finish quality.
Material-Specific Benefit: Aluminum 6061-T6: Prone to rapid work-hardening; precision mode prevents excessive strain | Stainless 304L: High springback requires slow rolling to achieve target diameter | Dual-speed enables single machine to handle diverse material grades without parameter recalculation
Both pinch (upper) and guide (side) rollers actuated via proportional hydraulic cylinders with pilot-operated check valves. Enables infinitely variable positioning for rapid batch changeovers—critical for custom diameter production runs.
Thin-Plate Production Benefit: Eliminates manual screw-down (mechanical adjustment takes 15-20 minutes) | Enables rapid switching between standard diameters (e.g., 400mm → 600mm → 800mm in <5 minutes total) | Reduces setup errors; new operators achieve consistent results quickly
High-strength structural steel (Q345), stress-relieved. Compact horizontal beam layout. Frame deflection <0.5mm under full 3500T load across 3000mm width. Weight approximately 35 tons. Service life 15+ years.
Upper main roll 42CrMo forged steel diameter 320mm with 30 kW hydraulic motor. Lower support rolls diameter 280mm with 22 kW motors. Side pinch roll diameter 240mm with 15 kW motor + planetary reducers.
Swashplate variable displacement pump 80 cc/rev, pressure-compensated. 2200L oil tank with integrated filtration & cooling. 12 kW oil cooler, 10μm absolute filtration. Flow divider maintains ±5% balance.
Siemens S7-1200 PLC compact version. 7-inch color touchscreen with dual-language support. Four LVDT transducers, four pressure transducers. Emergency stop button, dual-hand enable optional.
| Model | Max Pre-Bending Thickness (mm) | Max Rolling Thickness (mm) | Max Rolling Width (mm) | Main Motor Power (kW) |
|---|---|---|---|---|
| EZW12-10×1500 | 8 | 10 | 1500 | 11 |
| EZW12-12×2000 | 10 | 12 | 2000 | 15 |
| EZW12-16×2000 | 12 | 16 | 2000 | 18.5 |
| EZW12-20×2000 | 16 | 20 | 2000 | 18.5 |
| EZW12-25×2000 | 20 | 25 | 2000 | 22 |
| EZW12-30×2000 | 25 | 30 | 2000 | 37 |
| EZW12-25×2500 | 20 | 25 | 2500 | 37 |
| EZW12-30×2500 | 25 | 30 | 2500 | 37 |
| EZW12-30×3000 | 25 | 30 | 3000 | 45 |
| EZW12-40×3000 | 32 | 40 | 3000 | 55 |
| EZW12-50×3000 | 40 | 50 | 3000 | 55 |
| EZW12-60×3000 | 50 | 60 | 3000 | 75 |
| EZW12-70×3000 | 60 | 70 | 3000 | 75 |
| EZW12-80×3000 | 65 | 80 | 3000 | 90 |
| EZW12-90×3000 | 75 | 90 | 3000 | 90 |
| EZW12-100×3000 | 80 | 100 | 3000 | 110 |
| EZW12-100×3500 | 80 | 100 | 3500 | 45×4 |
| EZW12-100×4000 | 80 | 100 | 4000 | 45×4 |
| EZW12-120×3000 | 100 | 120 | 3000 | 55×4 |
| EZW12-120×3500 | 100 | 120 | 3500 | 55×4 |
| EZW12-120×4000 | 100 | 120 | 4000 | 55×4 |
| EZW12-140×3000 | 115 | 140 | 3000 | 75×4 |
| EZW12-160×3500 | 130 | 160 | 3500 | 90×4 |
| EZW12-180×3000 | 150 | 180 | 3000 | 55×8 |
| EZW12-200×4000 | 160 | 200 | 4000 | 75×8 |
Answer a few quick questions to help us recommend the most suitable plate bending machine for your application.
Aluminum 5000/6000 series (5083, 6061, 6063) | Thickness 8-20mm | Typical Diameter 300-1500mm | Mirror-polish surface finish, zero surface indentation, strain-hardening preserved.
304, 316L stainless steel | Thickness 10-25mm | HVAC ducts, decorative tubes, visible industrial piping | Cosmetic surface quality, no marring, consistent diameter ±1mm.
Duplex 2205, austenitic 316L, titanium alloys | Thickness 8-20mm | Typical Diameter 200-1200mm | Minimal scrap rate (material cost €80-300/kg), no rework allowance.
Copper-nickel (90/10), aluminum bronze | Thickness 6-18mm | Typical Diameter 400-2000mm | Internal bore cleanliness, no corrosion-inducing surface marks.
Stainless steel 304L, austenitic 316L (FDA-approved alloys) | Thickness 10-20mm | Typical Diameter 300-1000mm | Passivation-ready surface (no iron contamination), sanitary tube geometry.
Aluminum alloys (6061-T6) | Thickness 8-16mm | Typical Diameter 400-800mm | No surface defects post-weld, fatigue-resistant geometry.
Challenge: Previous 3-roll machine
produced aluminum tubes with ±2-3mm surface
indentation. Scrap rate 8-10%; customer rejected 12%
of orders. Specialty aluminum 6063-T6 difficult to
process without material degradation.
Solution:
Deployed EZW12X-20×2500 with hydraulic
pressure-balanced upper roller and dual-speed
system.
Result:
Surface Quality eliminated indentation; achieved
mirror-polish finish (Ra <0.8μm). Scrap Rate reduced
from 8-10% → 1.2%. Customer Acceptance improved from
88% → 99.5% first-pass quality. Material Yield
improved from 92% → 98.5%.
Challenge: Manufacturing 316L
stainless tubes for pharmaceutical equipment. Manual
surface inspection took 30 minutes per 100 tubes;
scrap loss 6% due to undetected surface marks.
Customer (major pharma OEM) rejects any tubes with
visible surface defects.
Solution:
Integrated EZW12X-25×3000 with advanced position
monitoring + integrated in-line visual inspection
station.
Result:
Defect Prevention: Hydraulic pressure-balanced
system eliminated 95% of previous surface marks.
Inspection Efficiency: Automated inspection reduced
manual check time by 80%. Customer Satisfaction:
Zero warranty returns. Cost Savings: Eliminated
rework; higher profit margin on pharmaceutical-grade
material.
Challenge: Duplex 2205 alloy tubes
(cost €150-200/kg). Previous machine scrap rate
5-6%; unacceptable for high-cost material. Batch
size 5-10 pieces; setup overhead 20-25 minutes per
geometry change.
Solution:
Deployed EZW12X-25×2500 with rapid hydraulic
pinch/side roll adjustment + flow divider
synchronization.
Result:
Scrap Reduction from 5-6% → <0.5% (material cost
savings €500-1000/day). Setup Time reduced from
20-25 min → 2-3 min rapid geometry switching.
Small-Batch Economics enabled acceptance of 5-10
piece custom orders. Annual Savings €180K+ material
cost reduction + new revenue from custom orders.
Challenge: Aluminum 6061-T6 fuel
tank components for European automotive OEM.
Tolerance ±0.8mm; surface quality critical for weld
joint integrity. Previous equipment scrap rate 4%;
workpiece springback made diameter control
difficult.
Solution:
Integrated EZW12X-20×2500 with dual-speed system +
precision low-speed rolling mode for final diameter
control.
Result:
Diameter Tolerance achieved ±0.5mm consistency (vs.
previous ±1.5mm). Surface Quality preserved
work-hardened surface; eliminated stress-induced
corrosion risk. Scrap Rate reduced from 4% → 0.8%.
OEM Confidence: Automotive customer approved as Tier
1 supplier; awarded long-term contract.
Aluminum is soft (HV 95-105 for 6061-T6) and prone to surface indentation from gravitational sag. Pilot-operated check valve maintains 10 bar minimum pressure on upper roller bearing, preventing 0.5-1mm surface depressions that would appear as cosmetic defects on finished tubes.
For 16mm aluminum: minimum ~200mm diameter. For 25mm: minimum ~300mm. Four-roll geometry (upper + two lower + side) provides superior support for small diameters vs. 3-roll systems, which struggle with minimum radii <400mm for thin materials.
Stainless 304/316L exhibits high elastic springback (~2-3mm for 20mm thick). High-speed mode (6 m/min) feeds material rapidly; precision low-speed mode (1.5 m/min) for final 50mm of rolling ensures accurate diameter without overshoot. Eliminates rework.
Yes. Reduced rolling forces + pressure-balanced system prevent additional strain hardening. Dual-speed enables slow rolling (1.5 m/min) for final diameter, minimizing stress on already work-hardened material. Machine preserves T6 properties.
Ra <0.8μm achievable on aluminum/stainless (mirror polish) due to four-point contact geometry + hydraulic pressure balance. Previous equipment typically produces Ra 1.5-2.5μm due to three-point stress concentration.
Yes. Flow divider synchronization + pressure-balanced system accommodate specialty alloys. Recommend material-specific pressure curves stored in CNC (duplex requires 20% higher pressure than stainless 304). First-time consultation recommended.
Pilot pressure (10 bar) maintained automatically via accumulator + check valve. Recommend monthly inspection (visual/pressure gauge check). Pilot pressure drop >2 bar indicates seal wear; replacement kits available (cost €150-250).
For 20mm aluminum, 800mm diameter tube: load (1 min) + high-speed feed (2 min) + precision rolling (3 min) + unload (1 min) = ~7 minutes total. Significantly faster than heavy-duty 4-roll due to reduced material mass + optimized geometry.
Yes. Dual-speed system + proportional valve control optimizes energy efficiency. Oil cooling capacity 12 kW adequate for continuous operation; oil temperature stabilizes 45-50°C under normal load. Recommend 15-minute break every 4 hours for operator rest.
2 days on-site training covers: material properties (hardness, springback), dual-speed mode selection, pressure-balance system operation, emergency procedures. Experienced aluminum/stainless workers typically independent within first 5 production runs.
Optional IoT upgrade includes pilot pressure monitoring. Alerts issued if pressure drops >2 bar for >5 minutes (indicates potential seal failure). Predictive maintenance flag 2-3 weeks before expected valve replacement.
| Accessory | Function | Value |
|---|---|---|
| In-Line Surface Inspection System | Real-time visual defect detection (scratches, dents, marks) | Zero surface-defect delivery; eliminates manual inspection labor (€500+/day) |
| Multi-Geometry CNC Program Library | Pre-store 15+ standard tube profiles with one-touch selection | Reduces setup errors; speeds batch changeovers; ideal for custom orders |
| Automatic Aluminum Feeding System | Motorized feed deck with soft-touch clamping | Eliminates manual loading labor; prevents surface marking during feed |
| Integrated Tack-Welding Station | Seam tracking + automated tack weld placement | Synchronized workflow; ±2mm seam alignment; speeds assembly |
| Enhanced Pressure-Balance Accumulator | Larger accumulator (10L vs. 5L standard) | Maintains pilot pressure stability over longer idle periods; critical for multi-shift production |
| SPC (Statistical Process Control) Software | Track diameter, ovality, surface finish; generate control charts | Quality certification capability; enables OEM traceability requirements |
| Remote Diagnostics & Monitoring | Cloud dashboard, predictive maintenance, mobile alerts | Prevents 75% unplanned downtime; remote expert support included |
| Hot-Rolling Configuration Package | Enhanced rollers, cooling system upgrade | Enables warm rolling of specialty alloys (up to 150°C aluminum annealing) |
| Ceramic-Coated Upper Roller | Specialized coating for ultra-soft materials (pure aluminum) | Extends roller life 2× on soft material production; eliminates cosmetic marring |
| Marine-Grade Corrosion Protection | Salt-spray resistant coatings, stainless hardware | Critical for coastal manufacturing environments |