Fully Hydraulic Continuous Helical Spiral Blade Cold Rolling Machine SFR-320

Two conical rolls extrude steel strip into helical blades through controlled relative movement, producing blades with uniform thickness and minimal dimensional error. The resulting surface is smooth with increased surface hardness from the cold working process, eliminating secondary finishing in most applications.

A single pair of conical rolls covers inner diameters from 25mm and outer diameters from 90mm to 800mm. Operators adjust roll positioning rather than swapping tooling, which significantly reduces changeover time when switching between blade specifications on the same production run.

The dual-motor drive system operates at a base speed of 980 r/min with variable frequency regulation, giving operators real-time control over roll speed. This is critical when processing different strip thicknesses or material grades — slower speeds for 8mm high carbon steel, faster speeds for thinner, softer stock.

The SFR-320 integrates forming, sizing, and hydraulic cut-off into one continuous process. The compact layout and centralized controls allow one operator to manage the full production cycle, reducing labor costs compared to multi-stage helical blade fabrication methods that require separate forming, welding, and cutting stations.

At 8.2 tons with multiple high-torque gearboxes and a rigid steel frame, the machine is built to absorb the sustained forces of cold rolling thick steel strip shift after shift. Hydraulic lines and fittings are rated for continuous duty, and the painted heavy-gauge frame resists corrosion in factory environments.