As a new type of duct construction process, the safety and security of the spiral air duct is self-evident: the appearance is beautiful, the strength is high, the level of mechanical automation is high, the processing speed is high, and the task load of the equipment can be reduced. Task efficiency and so on. Since the emergence of a few prosperous countries, considerable progress has been made and a qualitative leap in the processing of round wind pipes has been completed.
 
    (1) High quality of appearance. The inner wall of the formed air duct is lubricated, and the outer wall is fluent.
 
    (2) The air duct is strong. Because the spiral ribs formed by the outer wall nip are evenly distributed, the effect of uniform reinforcing ribs is achieved, and the unit strength is greater than that of shallow nipple-type air ducts;
 
    (3) The air duct sealing function is superior. Because of the mechanical processing, it can reduce the mistakes of remuneration operation, ensure that the air ducts are tight, and the amount of air leakage is far less than the current standard value;
 
    (4) Reduced use of data. Because the strength of the spiral duct unit is greater than that of the shallow duct, the thickness of the coil used in the duct duct of the same type can be reduced by one model, and the length of the duct is larger than that of the shallow mouthpiece duct, and the number of duct nozzles of the same length is also reduced. Clearly reduced, combined with the use of non-Lange convergence, many original data can be saved;
 
    (5) Fast processing and high precision. Therefore, the processing of the mechanical assembly line can be controlled independently of the skill level of the homework class, which is beneficial to the quality of the air duct process.