Description
The raw material, in the form of flat steel strips, undergoes a series of precise cold-rolling operations. Unlike hot rolling, which involves heating the metal to high temperatures, cold rolling is performed at or near room temperature. This cold working process not only shapes the steel strip into the continuous helical form but also imparts significant improvements to its mechanical properties. During cold rolling, the steel is passed through a set of specially designed rollers that gradually bend and twist the strip into the desired helical shape, ensuring uniformity in pitch, diameter, and thickness throughout the length of the blade. The absence of high heat prevents oxidation and scaling, resulting in a smooth, clean surface finish. Additionally, the cold working process enhances the material's hardness, strength, and dimensional accuracy, as the metal's grain structure is refined and aligned, leading to a more robust and reliable final product.
Specification Range of Cold-Rolled Continuous Helical Blades
| OD (mm) | Ф94 | Ф94 | Ф120 | Ф120 | Ф125 | Ф125 | Ф140 | Ф160 | Ф200 | Ф440 | Ф500 | Ф500 |
| ID (mm) | Ф25 | Ф25 | Ф28 | Ф40 | Ф30 | Ф30 | Ф45 | Ф40 | Ф45 | Ф300 | Ф300 | Ф320 |
| Pitch (mm) | 72 | 100 | 120 | 120 | 100 | 125 | 120 | 160 | 160 | 400 | 460 | 400 |
| Thickness (mm) | 3.5 | 3.5 | 3.5 | 3.5 | 3.5 | 3.5 | 3.5 | 3.5 | 3.5 | 3.5 | 3.5 | 3.5 |
| OD (mm) | Ф160 | Ф160 | Ф200 | Ф200 | Ф250 | Ф250 | Ф320 | Ф320 | Ф400 | Ф400 | Ф500 | Ф500 |
| ID (mm) | Ф42 | Ф42 | Ф48 | Ф48 | Ф60 | Ф60 | Ф76 | Ф76 | Ф108 | Ф108 | Ф133 | Ф133 |
| Pitch (mm) | 120 | 160 | 160 | 200 | 200 | 250 | 250 | 320 | 320 | 400 | 400 | 500 |
| Thickness (mm) | 3.5 | 3.5 | 3.5 | 3.5 | 3.5 | 5.0 | 5.0 | 5.0 | 5.0 | 5.0 | 5.0 | 5.0 |
| OD (mm) | Ф140 | Ф140 | Ф190 | Ф190 | Ф240 | Ф240 | Ф290 | Ф290 | Ф290 | Ф290 | Ф370 | Ф370 |
| ID (mm) | Ф60 | Ф60 | Ф60 | Ф60 | Ф60 | Ф60 | Ф89 | Ф89 | Ф114 | Ф114 | Ф114 | Ф114 |
| Pitch (mm) | 112 | 150 | 133 | 200 | 166 | 250 | 200 | 290 | 200 | 300 | 300 | 380 |
| Thickness (mm) | 5.0 | 5.0 | 5.0 | 5.0 | 5.0 | 5.0 | 5.0 | 5.0 | 5.0 | 5.0 | 5.0 | 5.0 |
Application Fields of Cold-Rolled Continuous Helical Blades
1.Agricultural sector:
Extensively used in grain conveyors, feed mixers, and manure handling equipment. Their ability to gently and efficiently move bulk materials like grains, seeds, and animal feed is highly valued.
2.Food processing industry:
Relied on in equipment such as screw conveyors (for transporting ingredients like flour, sugar, and spices) and mixers (for blending dough and other food products). Their smooth surface finish and ability to be made from food-grade stainless steel ensure compliance with strict hygiene standards.
3.Mining and construction industries:
Employed in conveyors and augers for handling aggregates, coal, sand, and gravel. They can withstand the abrasive nature of these materials due to their enhanced strength and wear resistance.
4.Wastewater treatment sector:
Used in sludge conveyors and mixers, efficiently moving and processing sludge and other waste materials.
5.Chemical industry:
Utilized for conveying and mixing various chemicals, thanks to their resistance to corrosion when made from appropriate alloys.
Performance Advantages of Cold-Rolled Continuous Helical Blades
Superior mechanical strength and durability:
The cold-rolling process enhances the material's tensile strength and hardness, enabling the blades to withstand heavy loads, high pressures, and prolonged use without deformation or failure.
Continuous, seamless design:
Eliminates the need for welded joints (which are prone to cracking and wear), thus improving the overall reliability and lifespan of the equipment they are part of.
Smooth surface finish:
Reduces friction between the blade and the material being handled, minimizing energy consumption and preventing material buildup (which can cause inefficiencies and downtime). It also simplifies cleaning, a key advantage in industries with strict hygiene requirements (e.g., food processing and pharmaceuticals).
Dimensional accuracy:
Ensures consistent performance, with uniform pitch and diameter leading to predictable material flow rates and mixing efficiency.
Cost-effectiveness:
Compared to other manufacturing methods, cold rolling requires less post-processing and generates less waste, making it economically viable for large-scale production.
In conclusion, cold-rolled continuous helical blades are a remarkable engineering solution, combining advanced manufacturing craftsmanship with a wide range of specifications to serve diverse applications. Their exceptional performance advantages, including strength, durability, efficiency, and cost-effectiveness, make them an indispensable component in modern industrial machinery. As industries continue to evolve and demand higher performance from their equipment, cold-rolled continuous helical blades are poised to remain at the forefront of material handling technology, driving efficiency and productivity across various sectors.
