Featured Roller Straighteners & Continuous Coil Processing Lines
Explore factory-direct metallurgical machinery calibrated to satisfy stringent DIN EN 10140, ASTM A6, and JIS G3193 flatness tolerances across high-yield structural, stainless, and non-ferrous coils.
High-Quality Professional Flying Shear Production Line
Continuous dynamic shearing with synchronized track-following blades, eliminating pause cycles on high-yield metallurgical lines.
CE Certified Cut to Length (CTL) Precision Line
Heavy-duty hydraulic uncoiling, multi-roller leveling cassette, and automated stackers complying with strict European machinery safety norms.
Industrial High-Speed Slitting Line Machine
Micrometric rotary knife precision slitting with hydraulic tension control, dynamic strip braking, and zero-burr recoiling arrays.
High Strength Heavy-Plate Leveling Machine
Engineered for high yield tensile alloys (≥960 MPa), utilizing reinforced 4-Hi/6-Hi backup roll nests to erase extreme coil memory.
Professional CNC Roller Straightening Machine
Precision roller straightener with micro-positioning servo actuators, eliminating residual internal tension prior to laser cutting.
Stainless Steel Uncoiling-Leveling-Shearing Line
6-High intermediate roll design preventing chatter marks on mirror-finish, 2B, and BA grade stainless steel coil processing.
Combined Slitting & CTL Hybrid Line
Multi-functional coil processing integration providing tandem rotary slitting and inline roller leveling to maximize plant footprint ROI.
Heavy-Duty Hot Rolled Slitting & Recoiling Line
Engineered for high-yield thick gauge coils up to 25mm thickness, delivering uniform recoil tightness and slit strip edge integrity.
Roller Straightening Mechanics: Elastoplastic Deformation Science
A comprehensive examination of how multi-roll alternating reverse bending neutralizes internal stresses, stabilizes yield plateaus, and rectifies 3-dimensional coil distortions.
Elastoplastic Reverse Bending
Roller straighteners function by subjecting metal sheets or bars to repeated alternating plastic deformation. By forcing the material past its yield point (σs) via precisely calculated roll intermeshing, initial inhomogeneous residual stresses are equalized into a uniform, neutral strain state across the entire cross-section.
- • Elimination of Longitudinal Coil Set
- • Suppression of Transverse Crossbow
- • Neutralization of Edge Waves and Center Buckle
Cassette Architecture: 4-Hi vs. 6-Hi
Standard leveling equipment can introduce secondary deflection markings when processing delicate surfaces. Our 6-High configurations implement intermediate support rolls that absorb backup roll indentation, protecting bright-annealed stainless, automotive Class-A aluminum, and pre-painted metals from visual degradation.
- • 4-High: High-load structural and plate steel
- • 5-High: Optimized for anti-fluting copper and alloys
- • 6-High: Automotive outer skin panels & mirror alloys
Hydraulic Roll-Camber Balancing
When processing uneven strip cross-sections, center buckling or wavy edges manifest due to differential length fibers. Jianfa straighteners incorporate hydraulic multi-zone push-pull wedge systems that adjust individual backup roll flights in real-time, deliberately compensating for center or edge fiber elongation discrepancies.
- • Dynamic servo screw-down responsiveness
- • Direct-coupled individual roll torque drives
- • Automated roll cassette quick-change in <15 mins
China Factory 4.0: Metallurgical Supply Chain Resilience & Wuxi Advantages
Combining four decades of proprietary engineering with the advanced manufacturing density of Jiangsu Province to deliver unmatched durability, capital efficiency, and rapid export cycle execution.
Total Component Autonomy
Unlike equipment integrators who outsource core machining, Wuxi Jianfa operates floor-type CNC boring mills, gantry planers, induction roll hardening ovens, and sub-zero cryogenic stabilization chambers in-house. All straightening rollers are forged from premium 42CrMo, 60CrMoV, or GCr15 alloys, quenched to 60-64 HRC with case hardening depths up to 8mm.
Yangtze River Logistics Node
Our Meicun, Wuxi manufacturing headquarters is positioned within a 120-minute heavy transportation corridor to Shanghai Port and Zhangjiagang Port. Heavy machinery bases, cast-steel housings, and wide-flange roll cassettes can be packed in breakbulk or flat-rack containers without inter-provincial delays, cutting transit lead times by up to 25%.
Smart Factory 4.0 Cyber Integration
Our straighteners interface seamlessly with plant MES/ERP systems via Siemens S7-1500 or Beckhoff EtherCAT architectures. Automatic roll gap positioning algorithms factor in coil steel yield stress, thickness variations measured by gamma-ray or laser triangulation sensors, and real-time roll deflections to adjust settings on the fly.
Global Commercial Landscape: Specialized Field Implementations
From automotive gigafactory stamping lines to naval heavy armor leveling, analyze how Jianfa machines solve extreme dimensional requirements across target manufacturing sectors worldwide.
Automotive AHSS & EV
Processing Dual Phase (DP) and Martensitic steels (tensile strength up to 1200-1500 MPa) for battery enclosure trays, impact beams, and chassis components requiring under 3 I-units flatness to prevent robotic weld seam misalignment.
Shipbuilding & Heavy Plate
Correcting hot-rolled carbon plates up to 25-40mm thickness for maritime bulkheads and offshore wind turbine towers. Utilizing high-torque planetary reduction gearboxes to eliminate thick plate cooling curvature.
Laser Cutting Service Centers
Eliminating latent internal tension that causes metal to "pop" or distort during fiber laser burning. Our precision roller leveling neutralizes the balanced tensile-compressive stresses within plates, preserving cutter head clearance.
Silicon Steel & Core Stamping
Specialized ultra-thin roller levelers with micro roll diameters (Ø18mm - Ø35mm) designed for non-grain oriented electrical steel sheets, preventing grain dislocation and preserving magnetic permeability in EV motors.
Roller Straightener Technical Specifications & Sizing Matrix
A rigorous engineering reference to help metallurgical procurement executives match material yield curves, strip widths, and thickness brackets to optimal machine configurations.
| Series Model | Material Thickness Range | Max Strip Width | Leveling Roll Quantity | Roll Diameter (Ø) | Target Yield Limit (σs) | Primary Industrial Use |
|---|---|---|---|---|---|---|
| JFL-Precision Thin | 0.2 mm – 2.5 mm | 1,250 mm – 1,650 mm | 21 – 23 Rolls (6-Hi) | Ø35 mm – Ø45 mm | ≤ 550 MPa | Automotive Skin / Appliances |
| JFL-Medium Universal | 1.5 mm – 8.0 mm | 1,500 mm – 2,000 mm | 17 – 19 Rolls (4-Hi/6-Hi) | Ø65 mm – Ø95 mm | ≤ 780 MPa | Service Centers / Laser Blanks |
| JFL-Heavy Armor Plate | 6.0 mm – 25.0 mm | 1,800 mm – 2,500 mm | 11 – 15 Rolls (4-Hi) | Ø130 mm – Ø220 mm | ≤ 960 MPa | Heavy Machinery / Shipbuilding |
| JFL-Ultra Thick Structural | 12.0 mm – 40.0 mm | 2,000 mm – 3,200 mm | 7 – 11 Rolls (2-Hi/4-Hi) | Ø240 mm – Ø320 mm | ≤ 1,100 MPa | Mining / Bridge Construction |
| JFL-Non-Ferrous & Cu/Al | 0.3 mm – 4.0 mm | 1,300 mm – 1,800 mm | 19 – 25 Rolls (5-Hi/6-Hi) | Ø40 mm – Ø60 mm | ≤ 420 MPa | EV Battery Foil / Aerospace |
Audited design, fabrication, thermal treatment, and line commissioning.
European Union certification for EN ISO 12100 electrical and mechanical safety.
Designated manufacturer in China's metallurgical machinery sector.
Frequently Asked Questions on Roller Straighteners & Processing Lines
In-depth responses authored by Jianfa's senior metallurgical engineering consultants to address critical commercial, mechanical, and logistical questions.
What metallurgical factors determine whether a 4-Hi or 6-Hi roller straightener is required?
How does roll diameter and roll center distance affect the leveling window?
How do Jianfa straighteners address edge wave and center buckle simultaneously?
What wear-resistant treatments are applied to Jianfa straightening rolls?
Can your roller straightener be retrofitted into our existing slitting or roll forming line?
What after-sales service and overseas commissioning protocols does Wuxi Jianfa deliver?
How does Wuxi Jianfa ensure equipment precision retention over 10+ years of high-volume operation?
What technical parameters are required from a buyer to generate an accurate quotation?
Complete Metal Coil Processing Lines & Precision Machinery
Direct from Wuxi Jianfa Machine-Building Co., Ltd. Explore our core lineup of cut-to-length lines, continuous slitting lines, moving shear lines, and heavy plate levelers.
Stainless Steel Cut to Length Line
Automated uncoiling, multi-roller leveling, high-precision shearing, and auto-stacking designed to preserve clean stainless sheet surfaces.
Hot Rolled Plate Moving Shear Production Line
Continuous dynamic shearing traveling synchronously with high-speed running plates, maximizing linear production tonnage.
HR Uncoiling-Slitting-Recoiling Strip Line
Rigid cutter arbor stands and multi-strand hydraulic tension units ensuring tightly wound, camber-free slit coils for downstream pipe mills.
Hot Rolled Sheet Uncoiling-Leveling-Shearing Line
Comprehensive turnkey processing for hot-rolled master coils, incorporating edge trimming, high-load leveling, and hydraulic shearing.
Professional Flying Shear Production Line
Synchronous servo carriage tracking for sheet cut-to-length without deceleration, delivering up to 80 cuts per minute.
Heavy-Duty Cut to Length Machinery
Engineered for high duty-cycle toll processors and steel distributors requiring tight length tolerances (±0.5mm) and flat sheets.
Turnkey Industrial Steel Slitting Line
Designed for rapid knife setup, automated strip tension leveling, scrap balling, and synchronized recoiling across wide coil formats.
High Strength Plate Leveler & Straightener
Heavy metallurgical roll frame with individual cardan shaft gear distribution, delivering high reverse bending torque.
Consult with Our Chief Metallurgical Engineers
Eliminate middleman markups and communication lag. Connect directly with Wuxi Jianfa's technical directors to review your material yield curves, workshop layout dimensions, and target annual processing capacities.
- Engineering-Led Review: Comprehensive feasibility check within 24 business hours.
- Full Factory Inspection: Pre-shipment running tests and on-site FAT testing at our Wuxi plant.
- Global Field Support: On-site mechanical assembly, electrical setup, and operator training worldwide.