Cold rolling mill is an advanced equipment for continuously rolling blades with strip steel. It can roll various specifications of blades required by adjusting the parts (roll offset, feeding height, rolling pressure, guide wheels, etc.). At present, there are various methods for manufacturing blades in China, including single piece stamping and welding, extrusion forming, winding forming, and cold rolling forming.

It has the advantages of high production efficiency, saving raw materials, good blade quality, high hardness, and good wear resistance. The factors that affect rolling forming include the material and thickness of the strip steel, the offset of the rolling mill, the feeding height, the rolling pressure of the rolling mill, the different specifications of the guide wheels and blades, and many other factors such as the temperature rise of the rolling mill during the rolling process. After years of unremitting efforts, this continuous cold-rolled spiral blade has been developed, which has the advantages of smooth surface, high hardness, wear resistance, one-time forming, and continuous no weld seam.