Featured Industrial Straightening & Coil Processing Lines
Engineered to satisfy European Machinery Directive 2006/42/EC standards. From heavy-gauge plate levelers to integrated slitting and cut-to-length systems, our equipment ensures residual stress relief and extreme flatness tolerance.
CE Certified Cut to Length Production Line
Precision uncoiling, multi-roller leveling, electronic length measurement, and auto-stacking for sheet metals.
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Heavy-Duty Rotary Coil Slitting Line
Engineered for precise longitudinal cutting of heavy hot-rolled and cold-rolled master coils with high-speed rewinding.
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High-Speed Flying Shear Production Line
Continuous dynamic shearing in synchronized motion with straightener feed. Maximizes throughput with zero surface marks.
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High Strength Steel Plate Leveler
Reinforced 4-Hi & 6-Hi multi-roller structural straightener engineered specifically for AHSS, Hardox, and Q690-Q960 plates.
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Professional Precision Straightening Machine
Calibrated micro-gap adjustment with individual back-up roller deflection control for optical flatness standards.
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Hot Rolled Plate Moving Shear Line
Heavy structural straightener coupled with a traveling mechanical shear for medium to ultra-thick steel plates up to 25mm.
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Stainless Steel Sheet Straightening Line
Engineered with chrome-plated work rollers and anti-marking synthetic guides for mirror and 2B surface preservation.
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HR Sheet Leveling & Recoiling Line
Combines coarse straighteners, edge slitting knives, and precision tensioners for high-capacity coil processing operations.
Product DetailsFour Decades of Heavy Metallurgical Straightening Excellence
Established in the early 1980s, Wuxi Jianfa Machine-Building Co., Ltd. is designated as a National Key Developing Enterprise within China's metallurgical machinery sector. Operating from a fully-integrated 40,000 m² state-of-the-art manufacturing facility in Wuxi, Jiangsu—conveniently situated in the Yangtze River Delta logistics cluster near Shanghai—we develop heavy-duty steel plate straighteners, coil levelers, slitting lines, and automated cut-to-length systems.
As a certified CE straightener manufacturer, our mechanical structures, electrical controls, and hydraulic systems strictly comply with European Union directives including Machinery Directive 2006/42/EC, Low Voltage Directive 2014/35/EU, and Electromagnetic Compatibility (EMC) Directive 2014/30/EU. Every straightener undergoes strict static load, dynamic finite element analysis (FEA), and continuous hot testing prior to global dispatch.
- 45 Million RMB Registered Capital supporting complex EPC turnkey projects
- Over 200 senior mechanical engineers, hydraulic specialists, and technicians
- In-house forging, CNC boring, inductive roll hardening, and full PLC automation assembly
Technological Trends in Heavy Plate Straightening Machinery
Modern plate flattening has evolved from simple mechanical bending into high-physics plastic-elastic deformation science. As steel producers engineer lighter and higher-yield alloys, straightener manufacturers face demanding technical requirements.
Advanced High-Strength Steel (AHSS) Adaptation
Global demand for Q690, Q960, Hardox, and Weldox abrasion-resistant plates requires straightening equipment capable of withstanding extreme yield stresses up to 1300+ MPa. Modern machines incorporate ultra-rigid forged frames, reinforced drive shafts, and high-torque gear distribution boxes to prevent structural deflection during plasticization.
Dynamic Hydraulic Gap & Tilt Control
Replacing traditional motorized worm-gear screw-downs, state-of-the-art straighteners utilize high-frequency servo-hydraulic cylinders. By independently commanding entrance, middle, and exit roll gaps under active position-feedback transducer monitoring, the machine dynamically corrects coil camber, center buckle, and wavy edges with sub-millimeter precision.
Residual Stress Elimination Algorithms
Visible surface flatness alone is no longer sufficient for automated downstream laser cutting and robotic welding. Modern straighteners execute deep inter-mesh alternating reverse bending—attaining up to 70% to 80% fiber plasticization—to eliminate internal differential stresses, ensuring plates do not warp after thermal cutting.
Global Procurement Needs & Heavy-Industry Deployments
Wuxi Jianfa provides tailor-engineered straightening and leveling solutions designed around strict customer yield requirements, thickness spectrums, and annual throughput targets across heavy global sectors.
Automotive & Transport Stamping
High-speed, 6-Hi precision straighteners designed for exposed body panels and structural crash components. Features anti-marking micro-roller cassettes preventing slivers, orange peel, and roller marks.
Shipbuilding & Offshore Platforms
Heavy-gauge 9 to 13 roll plate straighteners managing medium-to-thick ship plates (up to 50mm) in marine structural steel grades (AH36, DH36, EH36), delivering flat blanks ready for submerged arc welding.
Laser Cutting Service Centers
Eliminates internal tension in cold-rolled and pickled plates. Guarantees that parts cut by 15kW–30kW fiber lasers remain flat without thermal tip-ups that cause cutting head collisions.
Yellow Goods & Heavy Machinery
Engineered for crane boom sections, excavator chassis, and mining vehicle beds using ultra-high tensile quenched and tempered steels, offering high straightening force and robust hydraulic systems.
Technical Specification Reference Matrix
Compare our primary CE-certified steel straightener and leveling machinery configurations. Custom parameters are engineered based on specific coil width, thickness, and material yield properties.
| Equipment Type | Thickness Range | Width Range | Roll Config | Leveling Roll Dia. | Applicable Yield Limit | Line Speed |
|---|---|---|---|---|---|---|
| Heavy-Duty Plate Straightener | 8.0 mm – 25.0 mm | 1,200 – 2,500 mm | 7 to 11 Rolls (4-Hi) | Φ180 – Φ280 mm | ≤ 960 MPa | 10 – 35 m/min |
| Medium Sheet Precision Leveler | 2.0 mm – 8.0 mm | 1,000 – 2,200 mm | 13 to 17 Rolls (4-Hi / 6-Hi) | Φ90 – Φ140 mm | ≤ 1100 MPa | 20 – 60 m/min |
| Thin Precision Sheet Straightener | 0.3 mm – 3.0 mm | 600 – 1,800 mm | 19 to 23 Rolls (6-Hi) | Φ40 – Φ70 mm | ≤ 800 MPa | 30 – 120 m/min |
| Combined Slitting & CTL Straightener | 1.0 mm – 12.0 mm | 800 – 2,000 mm | 11 to 15 Rolls (4-Hi) | Φ100 – Φ160 mm | ≤ 750 MPa | 15 – 45 m/min |
CE Certification Standards & Comprehensive Safety Architecture
Wuxi Jianfa prioritizes operator health, mechanical durability, and international legal compliance. Our machinery is fully documented with CE technical construction files, risk evaluations, and strict safety validation.
Harmonized Safety Compliance
Engineered under EN ISO 12100 safety assessment, EN ISO 13849-1 (Performance Level PL d/e emergency braking and interlock circuits), and EN 60204-1 electrical equipment safety. Dual-channel light curtains, emergency stops, and hydraulic pressure locks prevent hazardous machine motion during intervention.
Localized Turnkey Support
We provide comprehensive installation, foundation engineering supervision, commissioning, and on-site operator training worldwide. Our engineering team routinely deploys across Europe, North America, the Middle East, Southeast Asia, and South America to ensure quick system setup.
Global Spare Parts & Remote Diagnostics
Industrial VPN router access permits Jianfa automation specialists to debug PLCs, diagnose servo alarms, and optimize roll gaps remotely in real time. We maintain dedicated overseas spare parts hubs to guarantee fast turnaround on wear rollers, bearings, and hydraulic seals.
Verified International Quality Accreditations & Factory Honors
Technology Roadmap & AI-Driven Closed-Loop Straightening
The future of plate straightening is autonomous, self-learning, and interconnected. Jianfa R&D is pioneering the integration of optical surface topography with real-time hydraulic roll control.
Laser Flatness Closed-Loop Feedback
In-line multi-channel laser triangulation sensors scan the entry and exit sheet surfaces at up to 200 Hz. If center buckle or edge wave is detected, the algorithm adjusts back-up roll profiles without manual operator intervention.
Digital Twin & Simulation Modeling
Using material yield, thickness, and elastic modulus data, the digital twin calculates stress-strain curves and determines initial roller gap settings, reducing trial-run scrap material on expensive alloys.
Predictive Maintenance & Bearing Health
Vibration sensors and thermal probes on main drive gearboxes and back-up roller journals monitor bearing wear and lubrication degradation, scheduling planned maintenance before unexpected downtime occurs.
Frequently Asked Questions by Global Engineers
Authoritative answers to technical, mechanical, compliance, and international shipping queries regarding our steel plate straighteners and leveling lines.
What is the mechanical difference between 4-Hi and 6-Hi straighteners?
A 4-Hi configuration consists of work rolls directly supported by back-up rolls, suited for hot-rolled steel plate and heavy-gauge sheet where high straightening force is required. A 6-Hi configuration introduces intermediate rolls between the work rolls and back-up rolls, preventing backup-roll wear shadow on sensitive surfaces like stainless steel, aluminum, and cold-rolled automotive steel.
How does Wuxi Jianfa guarantee compliance with EU CE Directives?
We operate under European standard test procedures for Machinery Directive 2006/42/EC, Low Voltage Directive 2014/35/EU, and EMC Directive 2014/30/EU. Every machine is supplied with official EC Declarations of Conformity, full risk assessment documentation under EN ISO 12100, and verified schematics conforming to EN 60204-1.
How are work rolls hardened to withstand high-tensile abrasion-resistant steel?
Our work rollers are forged from premium alloys such as 60CrMoV, 42CrMo, or GCr15. They undergo intermediate frequency induction quenching, multi-stage deep cryogenic stress-relief treatment, and precision grinding, achieving surface hardness up to HRC 60–64 with effective hardening depth reaching 8–15mm.
What technical data is required to calculate and quote a straightener?
To provide an accurate technical configuration, please supply: material grade(s) and yield strength range (MPa), minimum and maximum plate thickness, sheet/coil width range, whether raw material is cut plate or continuous master coil, target line speed (m/min), and specific flatness requirements (I-Units or mm/m tolerance).
Can the straightener be integrated into existing slitting or roll-forming lines?
Yes. Our straighteners can function as stand-alone flattening units or integrate with entry pinch rolls, uncoilers, crop shears, loop pits, and recoiler tension stations. Our automation engineers configure Profinet, Ethernet/IP, or Modbus protocols to synchronize line speed and emergency interlocking with third-party machinery.
What is the delivery timeline, export packing, and commissioning process?
Standard manufacturing cycle ranges between 90 to 150 days depending on machine scale. Equipment is treated with anti-corrosion grease, vacuum-barrier sealed, and secured in steel-reinforced transport skids for sea freight. Jianfa engineers supervise on-site anchoring, electrical termination, dry run testing, load trials, and train operators until target tolerances are attained.
Explore Complete Production Lines & Straightener Machinery
Review our heavy metallurgical processing portfolio. Select any configuration to examine technical blueprints, operational capacities, and factory-direct engineering proposals.
CE Certification Cut to Length Line
Heavy structural leveling and precise shearing line engineered for coil processing service centers worldwide.
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China Master Coil Slitting Line
High-precision longitudinal multi-strip cutting line with automatic tooling changeover and tight recoiling.
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Professional Flying Shear Line
Synchronous moving shear system capable of continuous sheet shearing without halting line feeding.
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High-Strength Leveling Machine
Multi-roll plasticizing straightener designed for heavy wear-resistant structural steels and thick plates.
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Professional Straightening Machine
Precision sheet flattening with independent servo screw-down cylinders and anti-deflection backup rolls.
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HR Plate Moving Shear Production Line
High-throughput medium and heavy plate production line featuring integrated straightener and traveling shear.
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Stainless Steel Coil Leveling Line
Surface-protective 6-Hi straightener coupled with auto drop stacker for delicate stainless steel sheets.
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Hot Rolled Slitting & Recoiling Line
Complete heavy line with pre-straightening pinch stand, rotary disc cutters, and hydraulic expanding recoiler.
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