This highly efficient, advanced, specialized equipment is used to continuously roll steel strip (usually flat steel) into spiral blades with uniform pitch and lead in one go. It represents an upgrade to the “segmented blanking → die pressing → welding and splicing” process.
| Parameter | L60 | L120 | L150 |
| Blade material | SPHC | SPHC | SPHC |
| Blade width | 20mm ~ 60mm | 20mm ~ 120mm | 20mm ~ 150mm |
| Blade thickness | 2mm ~ 3mm | 2mm ~ 6mm | 2mm ~ 8mm |
| Rolled blade inner diameter | 8mm ~ 180mm | 8mm ~ 180mm | ≥25mm |
| Inner diameter error | ≤ ±3mm | ≤ ±3mm | ≤ ±5mm |
| Rolled blade outer diameter | 50mm ~ 300mm | 60mm ~ 1000mm | 60mm ~ 750mm |
| Outer diameter error | ≤ ±3mm | ≤ ±3mm | ≤ ±5mm |
| Rolled blade pitch | 60mm ~ 300mm | 60mm ~ 800mm | 50mm ~ 800mm |
| Pitch error | ±5mm | ±5mm | ±5mm |
| Working mode | Two rollers working simultaneously | Two rollers working simultaneously | Two rollers working simultaneously |
| Operation method | Mechanical adjustment | Mechanical adjustment | Hydraulic adjustment |
| Total equipment power | 8.5 Kw | 26.5 Kw | 35.5 Kw |
| Equipment composition | Main unit, mechanical loading platform, hydraulic shears, power distribution cabinet | Main unit, mechanical loading platform, hydraulic shears, power distribution cabinet | Main unit, mechanical loading platform, hydraulic shears, power distribution cabinet |
Material: Coiled strip (flat steel).
Step 1: Forming the Inner Diameter (Vertical Roller Bending)
Step 2: Forming the Helix Angle (Horizontal Roller Squeeze and Guide)
Step 3: Sizing and Straightening (Finishing)
Step 4: Cutting (Optional)
The formed, continuous spiral blades are continuously fed out.
The equipment can be equipped with an in-line cutting device (such as a hydraulic shear or abrasive saw) to automatically cut the blades to the desired length when they reach the set length.
1. High Efficiency and Continuity: The production process is continuous, resulting in higher efficiency than traditional segmented production.
2. High Material Utilization: Virtually no waste is generated (except for head and tail losses), with material utilization exceeding 99%, significantly reducing costs.
3. Excellent Product Quality:
High Strength: The seamless design eliminates thermal stress concentration and strength loss associated with welding.
4. Dimensional Accuracy: Pitch, inner diameter, and outer diameter are consistently consistent, with excellent dynamic balancing.
5. Smooth Surface: Rolled to form, the surface is free of weld scars and offers low friction.
6. Flexibility: By adjusting the position and angle of the rolls, a single machine can produce spiral blades with varying inner diameters, pitches, and blade widths (blade heights) within a certain range, making changeovers relatively easy.
7. High Level of Automation: Equipped with PLC control, the machine automatically adjusts and produces the desired product simply by setting parameters (inner diameter, pitch, thickness, etc.) on the touchscreen.
