China CNC Flattener Manufacturer & Factory

A standard straightener typically utilizes 5 to 9 large-diameter rolls without individual backup support, primarily designed to remove gross coil set so material can feed into a press without jamming. A precision CNC flattener utilizes 17 to 23+ small-diameter, closely pitched rolls supported by multi-segment adjustable backup roll banks. This allows targeted elastic-plastic bending across specific zones of the strip, effectively eliminating complex defects like center buckle, wavy edges, and camber while eliminating microscopic internal stresses.

Roll diameter is governed by the modulus of elasticity, maximum yield strength, and minimum thickness of the target strip. Smaller roll diameters provide tighter bending radii necessary to reach the plastic zone in thin, high-yield materials, while larger shafts are required to handle the separating force generated by thick plate. Jianfa engineers calculate specific roll pitch and intermesh curves through computerized finite element strain simulations to ensure the machine spans the customer's exact operating spectrum.

Yes. Our heavy-duty high-strength flatteners are specifically built with ultra-rigid welded steel arch frames that undergo multi-stage thermal stress-relief annealing. The leveling cassettes incorporate heavy forged alloy steel backup bearings with multi-row hydraulic servo-wedge banks capable of exerting thousands of kilonewtons of counteracting force to hold roll arbors rigid under maximum separating loads.

For critical architectural or automotive skin materials, we configure 6-Hi leveling machines featuring intermediate transfer rolls that shield the work rolls from backup roll wear patterns. The work rolls are precision ground to a surface roughness of Ra ≤ 0.1–0.2 µm and hard-chrome plated (65 HRC). In addition, our lines feature rubber-sheathed pinch rolls, air-cushion or vacuum stacking systems, and integrated protective PVC film applicators.

Our export machinery complies fully with European CE directives (Machinery Directive 2006/42/EC and Low Voltage Directive 2014/35/EU). For North American deliveries, we engineer our electrical power control panels strictly to UL 508A and NFPA 79 specifications, utilizing Siemens, Schneider Electric, or Rockwell Automation (Allen-Bradley) electrical components.

Standard manufacturing timelines range from 90 to 150 days depending on line complexity and width capacity. Before shipment, buyers or third-party audit firms (SGS, TÜV, Bureau Veritas) conduct a comprehensive Factory Acceptance Test (FAT) at our 40,000 m² Wuxi plant, verifying electrical interlocks, continuous mechanical running tests with test coils, hydraulic temperature stabilization, and dimensional tolerance checks.