High-Precision Leveling & Processing Machinery
Direct factory delivery of heavy-plate levelers, multi-roll precision cassette units, and synchronized cut-to-length systems.
High Strength Leveling Machine
Engineered for high-yield-strength carbon steel, structural alloy, and AHSS coils with individual hydraulic roll compensation.
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Professional Straightening Machine
Provides complete neutralization of internal coil stresses, cross-bowing, and edge-waves before downstream stamping or laser fabrication.
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Hot Rolled Plate Moving Shear Line
Continuous dynamic traveling shear synchronized with heavy-duty levelers for continuous high-thickness plate division without stopping.
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Stainless Steel Leveling & Shearing Line
6-Hi roll topology with micro-finished intermediate rolls specifically configured to protect cosmetic stainless steel and aluminum finishes.
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Combined Slitting & CTL Production Line
Integrated processing architecture executing multi-slit division, precision roll leveling, and automatic pallet stacking in one footprint.
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Hot Rolled Sheet Slitting Line
Heavy rotary arbor cutter pairs combined with tight hydraulic recoil tension units for thick plate strip production.
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HR Uncoiling-Slitting-Recoiling Line
Engineered for high mechanical duty cycles supplying high-precision slit strip coils to continuous tube and structural profile mills.
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Hot Rolled Uncoil-Level-Shear Line
End-to-end automated plate conditioning line featuring closed-loop hydraulic screw-downs and optical length measurement arrays.
View Line SpecificationsThe Physics of Metal Leveling: Neutralizing Residual Stress Tensor & Curvature Defects
Why mechanical roller leveling is critical for zero-distortion laser cutting, precision CNC stamping, and automated structural fabrication.
Elastic-Plastic Alternating Bending
Coiled steel sheet retains non-uniform residual stress distributions caused by uneven thermal contraction during cooling and cold-rolling shear deformations. As a specialized China leveling machine manufacturer, Wuxi Jianfa equips machines with alternating staggered work rolls that subject the workpiece to decreasing cyclic plastic-elastic strain. By extending external fibers beyond their yield point (ReH) by 70% to 85%, our levelers homogenize the internal stress state, preventing "oil-canning", coil set, and edge wave rebound.
4-Hi, 5-Hi & 6-Hi Structural Mechanics
For standard carbon plate and heavy construction profiles, our 4-Hi configurations deliver strong mechanical leverage via high-rigidity back-up bearings. For surface-critical applications (bright cold-rolled sheets, automotive 5000/6000 series aluminum, decorative 304/316L stainless steel), Jianfa manufactures 6-Hi leveling cassettes. Intermediate drive rolls isolate the working rolls from the backup bearings, eliminating roll-transfer stripe artifacts and ensuring sub-millimeter flatness across widths up to 2,500 mm.
Individual Wedge & Hydraulic Deflection Control
Heavy sheet coil naturally develops localized center buckles or wavy edges depending on mill cooling rates. Jianfa incorporates multi-group motorized backup roller assemblies controlled by proportional servo-hydraulics. By adjusting individual wedge rows along the transverse profile, machine operators can dynamically apply localized positive or negative roll crowning, elongating shorter fiber zones across the material profile until cross-sectional fiber parity is attained.
The Wuxi Heavy Equipment Advantage: Vertical Integration & Cost-Efficiency
Operating inside China’s premier Yangtze River Delta industrial belt, Wuxi Jianfa combines vertically integrated machining facilities with high-level supply network precision.
Manufacturing Footprint
Fully owned heavy-assembly workshop equipped with multi-axis CNC gantry floor borers, high-frequency quench induction furnaces, and heavy crane overhead bays capable of fabricating monolithic 60-ton frame assemblies in Wuxi, Jiangsu.
Engineering Pedigree
Founded in the early 1980s and recognized as a National Key Developing Enterprise in China's metallurgical machinery sector. Four decades of proprietary development in leveling rolls, eccentric shafts, and transmission gearboxes.
Roll Hardening Integrity
Every leveling roller is forged from superior grade alloy steel (such as 42CrMo, 9Cr2Mo, or GCr15), undergoing multiple thermal tempering stages, intermediate induction quenching up to 5mm depth, chrome plating, and mirror finishing to Ra ≤ 0.2 µm.
TCO Capital Savings
Direct export sourcing from our Wuxi plant removes trading company overhead while delivering 100% component compatibility with standard Western automation parts (Siemens PLCs, Schneider switchgear, Rexroth hydraulics).
Global Procurement Standards: Safety Interlocks, CE Conformity & UL Requirements
Overseas factory buyers demand certified machinery designed to meet rigorous regional statutory codes and occupational safety norms.
European Union Directives & CE Certification
All leveling machines, slitting lines, and cut-to-length lines exported to the European Economic Area undergo verification under:
- Machinery Directive 2006/42/EC: Category 4 safety architectures featuring dual-channel interlocked physical guards, emergency pull-cords, and Pilz safety relays.
- Low Voltage Directive 2014/35/EU: Sealed IP54/IP55 climate-controlled electrical cabinets with documented heat dissipation studies.
- EMC Directive 2014/30/EU: Shielded cabling and line noise chokes preventing high-frequency inverter noise feedback into surrounding plant networks.
Our CE compliance documentation includes full technical construction files (TCF), risk assessments under EN ISO 12100, and verified test reports.
North American & International Plant Standards (UL, CSA, OSHA)
For installations in the United States, Canada, and Mexico, Wuxi Jianfa equips machinery according to local technical expectations:
- NFPA 79 Electrical Standard: UL-listed components, color-coded wiring, terminal ferrules, and complete alphanumeric labeling matching schematic prints.
- OSHA 1910 Guarding Compliance: Perimeter safety fencing with magnetic keyed interlocks, entry optical light curtains at entry/exit roll pinch points, and zero-energy state Lockout-Tagout (LOTO) disconnect valves.
- ASME Pressure Vessel Compliance: Hydraulic accumulator safety blocks with automatic pressure dumping upon emergency stop activation.
Custom engineering options are available for local power sources (e.g., 480V 60Hz 3-Phase for North America; 380V/415V 50Hz for Europe and Commonwealth nations).
Targeted Leveling Solutions for Demanding Industries
Engineered to handle materials ranging from thin aluminum strips to high-tensile structural steel plates.
Automotive Body & Chassis Fabrications
Vehicle lightweighting requires working with Advanced High-Strength Steels (AHSS, Dual-Phase DP600 to DP1180, and QP steels) with yield strengths reaching 1200+ MPa. Jianfa heavy-torque levelers feature hardened drive shafts, heavy gear distribution boxes, and micro-positioning roll adjustments to process thin, high-yield material without snap-back or internal micro-fractures.
Laser Cutting & Precision CNC Stamping
Plate conditioned on improper levelers releases latent internal stresses during laser thermal cutting, causing parts to pop up, strike cutting heads, or bow out of tolerance. Our multi-roll levelers deliver sub-millimeter flatness (less than 1 I-Unit / DIN EN 10029 Class S), enabling continuous lights-out automated fiber laser processing without head collisions.
Heavy Construction & Mining Equipment
Production of excavator booms, crane chassis, and earthmover frames requires processing thick plates (up to 25 mm - 32 mm) of abrasion-resistant steels (Hardox, Weldox, Q690D). Jianfa heavy-plate leveling units incorporate monolithic forged housing posts and massive backup bearings to apply hundreds of tons of counter-bending force.
Stainless Architectural & White Goods
For kitchen equipment, refrigerator side-panels, and cleanroom wall panels, surface preservation is critical. Our 6-Hi cassette levelers include automatic roll-cleaning devices, non-marking PU transport pinch rolls, and rapid cassette extraction fixtures, allowing complete roll changeovers in under 15 minutes to prevent cross-alloy contamination.
Shipbuilding & Offshore Foundations
Naval steel sheets subjected to harsh marine atmospheres must maintain high flatness for automated submerged arc welding. Jianfa wide-format levelers (handling coil and plate widths from 1,800 mm to 2,500 mm) eliminate edge wave deformations, ensuring root-gap consistency in automated welding gantries.
Steel Service Centers (Tolling & Distribution)
Tolling operations process varying coil grades throughout the week. With automated recipe management on Jianfa CNC touchscreens, operators select material thickness, width, and yield rating. The machine's smart gap calculator automatically positions entry and exit roll plungers via closed-loop linear scale feedback.
Emerging Trends: Smart Leveling, Servo Cassettes & IoT Integration
The transition from manual visual inspection to automated, closed-loop intelligent sheet processing.
Laser Flatness Scanning & AGC
Modern Jianfa installations can be configured with inline optical laser scanning bridges positioned post-leveler. The system profiles sheet flatness in real-time, feeding deviation metrics directly into the Automatic Gap Control (AGC) system. Motorized wedge actuators adjust dynamically to eliminate detected buckles before sheets arrive at the stacking bay.
IoT Remote Diagnostics & Predictive Upkeep
Leveling machine bearings and reduction gearboxes operate under significant cyclical loads. Jianfa lines integrate vibration, temperature, and torque sensors linked via OPC-UA to plant SCADA or cloud monitoring. Our engineers in Wuxi can assist clients with remote diagnostics, vibration analysis, and predictive roll bearing maintenance.
Interchangeable Quick-Change Cassettes
Handling diverse thickness ranges (e.g., 0.5 mm thin-gauge vs 8.0 mm heavy-plate) on a single machine body is made possible by our quick-change cassette architectures. A hydraulic trolley disengages the running roll cassette and slides in a dedicated replacement cassette with appropriate roll diameters within 10 to 15 minutes.
| Equipment Category | Roll Config | Thickness Range | Target Materials | Typical Flatness Result |
|---|---|---|---|---|
| Precision Thin-Gauge Leveler | 6-Hi (19 to 23 Rolls) | 0.3 mm – 3.0 mm | Cold-Rolled, Stainless 2B, Aluminum Alloys | ≤ 1 to 2 I-Units (DIN EN 10029) |
| Medium-Plate Stress-Relief Leveler | 4-Hi / 5-Hi (15 to 19 Rolls) | 2.0 mm – 12.0 mm | Hot-Rolled Pickled & Oiled, AHSS (DP800) | ≤ 3 I-Units / Flat for Fiber Laser |
| Heavy-Plate Straightener | 4-Hi (9 to 13 Rolls) | 6.0 mm – 25.0 mm+ | High-Tensile Structural, Hardox, Ship Plate | ≤ 1.0 mm per meter straightness |
| High-Speed Flying Shear Line | Integrated Multi-Roll + Shear | 0.5 mm – 6.0 mm | Galvanized, Coil Processing Service Lines | High throughput up to 80 m/min continuous |
Frequently Asked Questions: Leveling Technology & Factory Orders
Detailed engineering and procurement insights to assist your machinery evaluation.
What distinguishes a 4-Hi leveler from a 6-Hi precision leveling machine?
How does Wuxi Jianfa determine the ideal roll diameter and roll count for a specific coil range?
Can a roller leveler eliminate all internal stresses to prevent warping during laser cutting?
What international services are provided for overseas installation and operator commissioning?
What essential technical parameters are needed to prepare a formal engineering proposal?
Factory Direct Processing Systems & Lines
Complete coil handling solutions from uncoilers and multi-roll levelers to flying shears and automated stackers.
CE Certified Cut to Length Line
Certified cut-to-length processing line designed to European CE directives with safety interlocks and hydraulic stop shears.
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Professional Flying Shear Line
Continuous dynamic shearing line designed for high throughput without stopping the leveling roll strip transport cycle.
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Precision Coil Slitting Line
Engineered with dual arbor slitters, rapid blade changeover systems, and tension dampeners for strip preparation.
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Stainless Steel Cut to Length Line
Non-marking roll cassettes with integrated vacuum or air-float stacking tables designed for scratch-sensitive metal sheets.
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Integrated Slit & Cut-to-Length Line
Combined system capable of edge trimming, slitting, multi-roll leveling, and cross-cutting within a single production footprint.
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Heavy HR Slit-Recoiling Line
Heavy-duty line engineered for hot-rolled pickled strips, featuring hydraulic scrap winders and high-tension recoiling units.
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Heavy Slitting Line for Tube Mills
Continuous coil uncoiling, multi-strip rotary slitting, and hydraulic recoiling for structural tube and pipe manufacturing.
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Heavy Plate Uncoil-Level-Shear Line
High-tonnage leveler combined with CNC optical measurement and mechanical shears for heavy structural plates.
View Line SpecificationsDirect Factory Consultation with Wuxi Jianfa Engineers
Consult with our technical engineers to analyze your coil specifications, yield strengths, and target output tolerances. We provide customized CAD line layout proposals and detailed technical quotations.