Line Ⅲ consists of a feeding metal frame, leveler grooving roller, hydraulic notch and punch square machine, hydraulic shearer and folder. The electrical control system uses a computer with a closed-loop servo-system to increase the precision and reliability of the line. The maximum working speed is 10m/min. The length tolerance is ±0.5mm.The diagonal line tolerance is ±0.8mm. The capacity of the manufacturing process will produce 1000m2 of square duct.

1. Four power metal feeding frame

2. One leveler grooving roller machine

3. Four hydraulic notch and die

4. Hydraulic shearer and folding machine,Fold

5. Industrial computer and specific software