Featured Straightener Plus Roller & Processing Machinery
Explore 8 precision coil straightening, leveling, and slitting setups configured for heavy gauge, ultra-high-strength steel, and polished surfaces.
High Strength Leveling Machine
Engineered for deep stress release and elimination of coil memory in structural-grade materials with yield strength up to 960 MPa.
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Professional Straightening Machine
Multi-roll mechanical and hydraulic work roll calibration suited for sheet metal pre-straightening ahead of fine laser blanking.
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Hot Rolled Plate Moving Shear Line
Synchronous flying shear kinematics combined with heavy straightener plus roller cassettes for high output processing.
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Stainless Coil Straightening-Stacking Line
Hard-chrome micro-finished straightener rollers equipped with non-marking intermediate rollers to protect 2B/BA mirror surfaces.
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Slitting & Leveling Integrated Line
Comprehensive factory footprint saver: combines rotary slitting with straightener plus roller cassettes and automated blank stacking.
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HR Strip Slitting & Recoiling Line
Engineered for thick plates; features preliminary straightener roller benches to feed smooth strip into rotary shear tooling.
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HR Heavy Uncoiling-Slitting Line
Heavy structural design built for precision pipe fabrication feedstock, utilizing forged alloy steel rollers with HRC 60+ hardness.
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Plate Uncoiling-Shearing-Stacking Line
Heavy-gauge straightener plus roller system with multi-point automated backup roll adjustment for extreme flatness.
Explore SpecificationsIndustrial Foundations of Wuxi Jianfa Machine-Building
Established in the early 1980s in the Yangtze River Delta metallurgical heartland, Wuxi Jianfa has developed into a national key developing enterprise in China's metallurgical machinery sector.
Over 40 years of continuous technical innovation in metal straightening and leveling.
Fully owned, state-of-the-art workshops for CNC machining, thermal treatment, and line assembly.
Solid financial foundation providing enterprise stability for multi-line turnkey deliveries.
Mechanical design engineers, automation developers, and global commissioning technicians.
Straightener Plus Roller Mechanics: Eliminating Residual Stress
Industrial metal coils suffer from plastic deformation defects: coil set, crossbow, edge wave, and center buckle. The straightener plus roller system uses alternating plastic-elastic bending to guarantee flat sheet deliverables.
Work Roll Metallurgy & Heat Treatment
Roll durability determines straightener lifespan. We use forged alloy steels (42CrMo, GCr15, 9Cr2Mo) processed through medium-frequency induction quenching and sub-zero cryogenics to reach HRC 60–64 and an effective case depth over 8mm.
- Hard chromium plating (0.03–0.05mm)
- Mirror finish roughness Ra ≤ 0.20 μm
- High core ductility to handle peak impact
4-Hi vs. 6-Hi Precision Cassette Architecture
To process delicate materials like aluminum, electro-galvanized, or prepainted steel without shadow marks, our 6-Hi leveling units add precision intermediate rolls between work rolls and backup rolls.
- 4-Hi: Heavy plate & construction structural coils
- 6-Hi: Automotive grade & appliance sheet metal
- Rapid hydraulic cassette exchange in < 15 mins
Independent Multi-Zone Backup Flight System
To target specific strip defects (e.g., wavy edges or center buckles), our machines integrate independent wedge-actuated backup roller columns. Controlled via closed-loop CNC, operators adjust local crown to ensure consistent strip fiber elongation.
- Individual electro-mechanical servo drives
- Real-time roll-gap displacement monitoring
- High-capacity needle roller bearing assemblies
| Straightener Series | Material Thickness | Max Width | Roll Quantity | Work Roll Diameter | Leveling Precision |
|---|---|---|---|---|---|
| JFL-Light Precision | 0.2 – 2.0 mm | 1,300 mm | 19 – 23 Rolls (6-Hi) | Φ 25 – Φ 40 mm | ≤ 0.5 mm/m² (DIN EN 10131) |
| JFM-Medium Standard | 1.0 – 6.0 mm | 1,600 mm | 17 – 21 Rolls (4-Hi/6-Hi) | Φ 50 – Φ 85 mm | ≤ 1.0 mm/m² (ASTM A568) |
| JFH-Heavy Structural | 4.0 – 16.0 mm | 2,000 mm | 13 – 17 Rolls (4-Hi) | Φ 110 – Φ 180 mm | ≤ 1.5 mm/m² (ISO 9444-2) |
| JFX-Ultra Heavy Plate | 8.0 – 25.0 mm | 2,500 mm | 9 – 13 Rolls (4-Hi) | Φ 200 – Φ 280 mm | ≤ 2.0 mm/m² (GB/T 709) |
Why Global EPCs & Service Centers Source From Wuxi, China
Procuring straighteners and roll levelers from China provides a balanced mix of engineering capacity, complete industrial clusters, and lower capital expenditure per line.
Yangtze River Delta Industrial Cluster
Located in Wuxi, Jiangsu, our plant operates within China's metallurgical and mechanical manufacturing corridor. Forgings, gearboxes, heavy castings, and electrical automation components (Siemens, Schneider, Rexroth) are sourced directly within an 80km radius, reducing lead times.
Direct Ocean Freight Logistics
Our assembly hub connects directly via expressways to Shanghai Port (140 km) and Taicang Port. Oversized frames, straightener roller cassettes, and 40-ton uncoilers move efficiently with minimal transit risk.
Total Internal Manufacturing Control
Unlike trading intermediaries, Wuxi Jianfa manages all core manufacturing under one roof: large-scale gantry milling, roll heat-treatment ovens, surface finishing, and electrical cabinet wiring. This gives buyers end-to-end traceability and quicker engineering revisions.
Localized Engineering, Certification, & On-Site Commissioning
Meeting local site safety standards and operational codes is critical for overseas installations across the Americas, Europe, the Middle East, and Southeast Asia.
CE & ISO Certification
Lines comply fully with the European Machinery Directive 2006/42/EC, Low Voltage Directive 2014/35/EU, and ISO 9001:2015 quality frameworks. Standard features include physical safety interlocks, light curtains, emergency pull cords, and dual-circuit safety relays.
Custom Electrical Adaptability
To match local plant environments, we customize transformers, drives, and PLC controls for varied input supplies (480V 60Hz North America, 400V 50Hz Europe, 380V/415V Asia). Standard configurations use international components from Siemens, Schneider, and ABB.
Expatriate Dispatch & Remote Diagnostics
Our commissioning engineers handle mechanical leveling, foundation anchor positioning, hydraulic calibration, and operator training on site. Systems also include industrial VPN gateways for real-time remote telemetry, diagnostic troubleshooting, and PLC updates.
Industrial Applications for Precision Straightened Metal
Residual stress causes warping during downstream stamping, forming, or laser processing. Jianfa straightener plus roller systems ensure material stability across diverse applications.
Automotive Stamping & Body Shells
High-strength Dual Phase (DP) and TRIP steels require precise 6-Hi leveling to avoid springback and snap-through during deep-drawing operations.
High-Power Fiber Laser Cutting
Plate with internal stresses can warp when heated during laser cutting, damaging cutting heads. Correct leveling relieves tension, ensuring safe, consistent, lights-out cutting.
Appliance Panels & Electronics
Zero surface tolerance: Refrigerator doors and architectural panels require blemish-free finishes. Micro-ground work rolls process prepainted and galvanized coil without marking.
Tube, Pipe & Heavy Roll Forming
Reliable welding on tube and pipe mills requires minimal camber and uniform edge thickness, delivered via precision roll straightener cassettes.
Future Trends: Smart Leveling & Closed-Loop Feedback
Manual mechanical adjustment is giving way to automated sensor integration, intelligent material databases, and adaptive roll positioning.
AI Material Defect Pre-calculation
Modern lines integrate automated recipe databases. Once an operator inputs steel grade, sheet thickness, width, and measured yield strength, the system automatically sets roller plunge depth, back-tilt angles, and individual backup crowning values.
In-Line Optical Laser Flatness Sensors
Contactless multi-point laser triangulation arrays inspect exiting strip surfaces at up to 120 m/min. Wave height and I-unit deviations are fed back into backup servo drives for real-time deflection corrections.
Energy Recovery & Predictive Monitoring
Regenerative drive buses on uncoilers and tension units feed braking power back into leveling drives, reducing net energy use by 20–30%. Integrated vibration and temperature sensors provide predictive maintenance alerts for roller bearings.
Frequently Asked Questions for Plant Engineers & Buyers
Direct technical explanations covering roll geometry, yield limits, maintenance cycles, and purchasing specifications.
What is the mechanical difference between a straightener and a precision roller leveler?
How do you calculate the optimal work roll diameter for high-strength steel grades?
How often do straightener rollers need re-grinding and surface maintenance?
What parameters are required to receive a technical line proposal?
What protections are implemented for export sea transit?
Full Line Coil Processing & Straightener Machinery Catalog
Explore 8 core production line designs manufactured by Wuxi Jianfa, each engineered to integrate with straightener plus roller systems.
Slitting Line Solutions
Precision rotary shears for multi-strip coil slicing, complete with tension levellers and scrap winders.
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Flying Shear Line
Continuous cutting without stopping the strip, integrated with leveling roller stands for high-throughput sheet metal delivery.
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CE Certified Cut to Length Line
High-precision uncoiling, multi-roller leveling, length encoding, hydraulic shearing, and vacuum stacking systems.
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Heavy-Plate Leveling Unit
Built to flatten ultra-thick plate material up to 25mm with hydraulic backup roll crowning.
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Compact Sheet Straightener
Precision standalone straightener roller units suited for press-feed lines and roll-forming entry stages.
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Moving Shear Plate Line
Continuous cutting for thick plate, balancing line velocity with clean, burr-free shear cuts.
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Stainless Surface Finish Line
6-Hi roller leveling designed to prevent scratches on bright annealed and brushed stainless steel coils.
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Automated CTL & Stacker Line
End-to-end automation from coil loading cart to magnetic drop stacking for high-volume service centers.
Explore Stacking LinesRequest a Customized Technical Proposal
Connect directly with our engineering sales group. We provide preliminary layout designs, foundation plans, and formal quotations within 24 hours.
Phone & WhatsApp
Direct line for engineering inquiries, line sizing, and urgent commissioning support.
+86 139 2116 6015Office: +86-510-88151451
Engineering Sales Desk
Submit coil drawings, steel grade sheets, and plant layouts for technical review.
[email protected]Secondary: [email protected]
Factory Location
Visits welcomed. Fast high-speed rail transit from Shanghai Hongqiao Airport.
No. 58 Qunxing Road, Meicun, Xinwu District, Wuxi, Jiangsu, China