1. The spiral forming speed is fast, the production efficiency is high, the material utilization rate is high, the overall rigidity is good, and the overall strength is high. ;
2. The welding assembly is convenient and quick, and the overall strength is good;
3. The thickness of the outer edge is about 1/2 of the thickness of the inner hole, but after hardening by rolling and cooling, the hardness of the outer edge is more than doubled, which correspondingly compensates for the wear resistance of the outer edge;
4. Heat treatment can be carried out according to requirements to improve the surface hardness of the blade and improve the wear resistance;
5. The forming size is limited, only the spiral blade of low carbon steel material with a thickness ≤ 8mm and the maximum radius difference (outer diameter/2-inner diameter/2) ≤ 165mm can be formed;
6. The one-time debugging before production consumes high materials, which is not suitable for one-time small batch supply of one specification, and there is a minimum order quantity requirement.